Abortion debate

The abortion debate is a longstanding, ongoing controversy that touches on the moral, legal, medical, and religious aspects of induced abortion. In English-speaking countries, the debate most visibly polarizes around adherents of the self-described "pro-choice" and "pro-life" movements. Pro-choice supporters uphold that individuals have the right to make their own decisions about their reproductive health, and that they should have the option to end a pregnancy if they choose to do so, taking into account various factors such as the stage of fetal development, the health of the woman, and the circumstances of the conception. Pro-life advocates, on the other hand, maintain that a fetus is a human being with inherent rights that cannot be overridden by the woman's choice or circumstances, and that abortion is morally wrong in most or all cases. Both terms are considered loaded words in mainstream media, where terms such as "abortion rights" or "anti-abortion" are generally preferred.

Each movement has, with varying results, sought to influence public opinion and to attain legal support for its position. Many who take a position argue that abortion is essentially a moral issue, concerning the beginning of human personhood, rights of the fetus, and bodily integrity. The debate has become a political and legal issue in some countries with anti-abortion campaigners seeking to enact, maintain and expand anti-abortion laws, while abortion-rights campaigners seek to repeal or ease such laws and expand access to the procedure. Abortion laws vary considerably between jurisdictions, ranging from outright prohibition of the procedure to public funding of abortion. The availability of safe abortion also varies across the world and exists mainly in places that legalize abortion.

Overview
In ancient times, issues such as abortion and infanticide were evaluated within the contexts of family planning, gender selection, population control, and the property rights of the patriarch. Rarely were the rights of the prospective mother, much less the prospective child, taken into consideration. Then, as now, these discussions often concerned the nature of humankind, the existence of a soul, when life begins, and the beginning of human personhood.

Discussion of the putative personhood of the fetus may be complicated by the current legal status of children. Like minors in the U.S. a fetus or an embryo is not legally a "person", not having reached the age of majority and not deemed able to enter into contracts and sue or be sued. Since the 1860s, they have been treated as persons for the limited purposes of offence against the person law in the UK including Northern Ireland, although this treatment was amended by the Abortion Act of 1967 in England, Scotland and Wales. Furthermore, there are logistic difficulties in treating a fetus as "the object of direct action". As one New Jersey Superior Court judge noted, "If a fetus is a person, it is a person in very special circumstances – it exists entirely within the body of another much larger person and usually cannot be the object of direct action by another person." Proposals in the current debate range from complete prohibition, even if the procedure is necessary to save the woman's life, to complete legalization with public funding.

Terminology
Many of the terms used in the debate are seen as political framing: terms used to validate one's own stance while invalidating the opposition's. For example, the labels "pro-choice" and "pro-life" imply endorsement of widely held values such as liberty or the right to life, while suggesting that the opposition must be "anti-choice" or "anti-life". Terms used by some in the debate to describe their opponents include "pro-abortion" or "pro-abort"; however, these terms do not always reflect a political view or fall along a binary; in one Public Religion Research Institute poll, seven in ten Americans described themselves as "pro-choice" while almost two-thirds described themselves as "pro-life". Another identifier in the debate is "abolitionist", which harks back to the 19th-century struggle against human slavery.

Appeals are often made in the abortion debate to the rights of the fetus, pregnant woman, or other parties. Such appeals can generate confusion if the type of rights is not specified (whether civil, natural, or otherwise) or if it is simply assumed that the right appealed to takes precedence over all other competing rights (an example of begging the question). The appropriate terms with which to designate the human organism prior to birth are also debated. Some anti-abortion supporters regard the technical terminology "embryo" and "fetus" as dehumanizing, whereas some abortion rights proponents regard ordinary terms such as "baby" or "child" as emotional.

The use of the term "baby" to describe the unborn human organism is seen by some scholars as part of an effort to assign the organism agency. This assignation of agency functions to further the construction of fetal personhood. Anti-abortion activists occasionally use the term the "Silent Holocaust" or "the American genocide" in reference to the number of abortions that have been performed in the United States since 1973.

Political debate
There is abundant debate regarding the extent of abortion regulation. Some abortion rights advocates argue that it should be illegal for governments to regulate abortion any more than other medical practices. On both sides of the debate, some argue that governments should be permitted to prohibit elective abortions after the 20th week, viability, or the second trimester. Some want to prohibit all abortions, starting from conception.

Those in favor of abortion rights argue that governments should not restrict abortion more strictly than other medical practices for various reasons regarding potential human rights violations and the right to privacy. Those who oppose abortion rights argue against the procedures and nature of abortion. The two sides of the political debate represent the competing moral principles of either the “sanctity of life” versus “a woman’s right to choose.” The abortion debate itself derives from federal and public policies rapidly changing when determining women’s reproductive health demands which is hard to measure accurately like other common public health issues.

The Dobbs decision
As an example of political decisions concerning the abortion debate, in the recent years following the Dobbs ruling, state governments have been granted political authority over abortion access and resources. The issue-framing and policy-making aspects vary from each perspective and interest but ultimately form the strategic decisions for legislators for support or opposition to their efforts.

The Dobbs decision allows other debates to form over several different concepts in other state legislature concerning the terms "privacy" and "liberty interests" Which those cases have determined the foundation of clinician-patient relationships and private medical decisions. Abortion decisions bring focus onto other state efforts corresponding to abortion, such as limiting access to medication abortions, preventing third parties from assisting anyone seeking an abortion, or punishing women who end their pregnancies. While evaluating the Dobbs ruling, the Court had determined the importance of the opposing factors of "respect for and preservation of prenatal life at all stages...; the protection of maternal health and safety; the elimination of particularly gruesome or barbaric medical procedures;... integrity of the medical profession; the mitigation of fetal pain, and the prevention of discrimination on the basis of race, sex, or disability."

Privacy
In the United States, the debate has been framed as an aspect of privacy. Even though the right to privacy is not explicitly stated in many constitutions of sovereign nations, many people see it as foundational to a functioning democracy. In general the right to privacy can be found to rest on the provisions of habeas corpus, which first found official expression under Henry II in 11th century England, but has precedent in Anglo-Saxon law. This provision guarantees the right to freedom from arbitrary government interference, as well as due process of law. This conception of the right to privacy is operant in all countries which have adopted English common law through Acts of Reception. The law of the United States rests on English common law by this means.

Time has stated that the issue of bodily privacy is "the core" of the abortion debate. Time defined privacy, in relation to abortion, as the ability of a woman to "decide what happens to her own body". In political terms, privacy can be understood as a condition in which one is not observed or disturbed by government.

Traditionally, American courts have located the right to privacy in the Fourth Amendment, Ninth Amendment, Fourteenth Amendment, as well as the penumbra of the Bill of Rights. The landmark decision Roe v Wade relied on the 14th Amendment, which guarantees that federal rights shall be applied equally to all persons born in the United States. The 14th Amendment has given rise to the doctrine of Substantive due process, which is said to guarantee various privacy rights, including the right to bodily integrity.

While governments are allowed to invade the privacy of their citizens in some cases, they are expected to protect privacy in all cases lacking a compelling state interest. In the US, the compelling state interest test has been developed in accordance with the standards of strict scrutiny. In Roe v Wade, the Court decided that the state has an "important and legitimate interest in protecting the potentiality of human life" from the point of viability on, but that prior to viability, the woman's fundamental rights are more compelling than that of the state.



U.S. judicial involvement
Roe v. Wade struck down state laws banning abortion in 1973. Over 20 cases have addressed abortion law in the United States, all of which upheld Roe v. Wade. Since Roe, abortion has been legal throughout the country, but states have placed varying regulations on it, from requiring parental involvement in a minor's abortion to restricting late-term abortions.

Legal criticisms of the Roe decision address many points, among them are several suggesting that it is an overreach of judicial powers, or that it was not properly based on the Constitution, or that it is an example of judicial activism and that it should be overturned so that abortion law can be decided by legislatures. Justice Potter Stewart, who joined with the majority, viewed the Roe opinion as "legislative" and asked that more consideration be paid to state legislatures.

Candidates competing for the Democratic nomination for the 2008 presidential election cited Gonzales v. Carhart as judicial activism. In upholding the Partial-Birth Abortion Ban Act, Carhart is the first judicial opinion upholding a legal barrier to a specific abortion procedure.

"Where, in the performance of its judicial duties, the Court decides a case in such a way as to resolve the sort of intensely divisive controversy reflected in Roe and those rare, comparable cases, its [505 U.S. 833, 867] decision has a dimension that the resolution of the normal case does not carry. It is the dimension present whenever the Court's interpretation of the Constitution calls the contending sides of a national controversy to end their national division by accepting a common mandate rooted in the Constitution ... [W]hatever the premises of opposition may be, only the most convincing justification under accepted standards of precedent could suffice to demonstrate that a later decision overruling the first was anything but a surrender to political pressure and an unjustified repudiation of the principle on which the Court staked its authority in the first instance." "Quite to the contrary, by foreclosing all democratic outlet for the deep passions this issue arouses, by banishing the issue from the political forum that gives all participants, even the losers, the satisfaction of a fair hearing and an honest fight, by continuing the imposition of a rigid national rule instead of allowing for regional differences, the Court merely prolongs and intensifies the anguish [over abortion]."

Dobbs v. Jackson overturned the Roe decision on 24 June 2022. This was a Supreme Court decision about Mississippi's law stopping abortions after 14 weeks.

Although there is a general presumption against a state’s ability to regulate extraterritorially (i.e., beyond its borders), legal authority suggests that the Constitution does not clearly prohibit a state from regulating abortion travel.

Canada


With R v. Morgentaler, a 5–2 majority of the Supreme Court of Canada held that the abortion provisions of the Criminal Code were unconstitutional. The majority of the Court held that the abortion provisions infringed the rights of pregnant women, contrary to the security of the person clause of the Canadian Charter of Rights and Freedoms, and could not be justified. The only laws currently governing abortion in Canada are those which govern medical procedures in general, such as those regulating licensing of facilities, the training of medical personnel, and the like. Laws also exist which are intended to prevent anti-abortion activists from interfering with staff and patient access to hospitals and clinics, for instance by creating buffer zones around them.

Because the courts did not establish abortion as a constitutional right, Parliament continues to have jurisdiction to legislate with respect to abortion. The Progressive Conservative government of Brian Mulroney twice attempted to do. The first bill, introduced in 1988, was defeated in the House of Commons. The next year, in 1989, the Mulroney government introduced a bill that would allow abortion only if two doctors certified that the woman's health was in danger. This bill passed the House of Commons but was defeated by a tie vote in the Senate. There have not been any further government attempts to enact legislation relating to abortion in Parliament since then.

Although the courts have not ruled on the question of fetal personhood as a matter of constitutional law, the question has been raised in two cases, Tremblay v. Daigle and R. v. Sullivan. Both cases relied on the born alive rule, part of Canadian common law and Quebec civil law, to determine that the fetus was not a person at law.

Two further cases are notable: Dobson (Litigation Guardian of) v. Dobson, and Winnipeg Child & Family Services (Northwest Area) v G.(D.F.), which dismissed fetal abuse claims.

Countries that refuse abortions
As of 2016, there are six countries that completely outlaw abortion: El Salvador, Malta, Vatican City, the Dominican Republic, Philippines, and Nicaragua. This prohibits a woman from having an abortion for any reason (underage, fetal impairment, rape/incest), even if it might mean saving her life. Penalties include jail time. For example, in El Salvador abortions are punishable with up to 50 years in prison.

Countries with strict laws
Argentina allowed abortion only in case of rape or if the woman's health was at risk. In December 2020, the Argentine Senate passed a bill to legalize abortion. Also in 2020, the Constitutional Tribunal ended almost all legal abortion in Poland. China has a free abortion policy but some studies show that its government also uses forced abortion to enforce strict limits on how many children each family can have. In the United States, there are increasing efforts to limit access to abortion by states in the wake of the 2022 reversal of Roe v Wade (1973) which allowed for a constitutional right to abortion.

Effects of legalization/illegalization
Abortion rights advocates argue that illegalization of abortion increases the incidence of unsafe abortions, as the availability of professional abortion services decreases, and leads to increased maternal mortality. According to a global study collaboratively conducted by the World Health Organization and the Guttmacher Institute, most unsafe abortions occur where abortion is illegal. Withholding access to safe abortions results in 30,000 abortion related deaths per year. Women may also choose suicide when abortion is illegal.

The effect on crime of legalized abortion is a subject of controversy, with proponents of the theory generally arguing that "unwanted children" are more likely to become criminals and that an inverse correlation is observed between the availability of abortion and subsequent crime.

Economist George Akerlof has argued that the legalization of abortion in the United States contributed to a declining sense of paternal duty among biological fathers and to a decline in shotgun weddings, even when women chose childbirth over abortion, and thus to an increase rather than a decrease in the rate of children born to unwed mothers.

KFF conducted a nationally representative survey of office-based OBGYNs in the U.S. Since Dobbs, 42% of OBGYNs report that they are very or somewhat concerned about their own legal risk when making decisions about patient care and abortion. This could greatly affect how many OBGYNs will continue to practice.

Personhood
There are differences of opinion as to whether a zygote/embryo/fetus acquires "personhood" or was always a "person". If "personhood" is acquired, opinions differ about when this happens.

Traditionally, the concept of personhood entailed the soul, a metaphysical concept referring to a non-corporeal or extra-corporeal dimension of human being. Today, the concepts of subjectivity and intersubjectivity, personhood, mind, and self have come to encompass a number of aspects of human being previously considered the domain of the "soul". Thus, while the historical question has been: when does the soul enter the body, in modern terms, the question could be put instead: at what point does the developing individual develop personhood or selfhood.

Since the zygote is genetically identical to the embryo, the fully formed fetus, and the baby, the notion of acquired personhood could lead to an instance of the Sorites paradox (also known as the paradox of the heap).

Related issues attached to the question of the beginning of human personhood include the legal status, and subjectivity of the pregnant woman and the philosophical concept of "natality" (i.e. "the distinctively human capacity to initiate a new beginning", which a new human life embodies).

In the 1973 US judgment Roe v. Wade, the opinion of the justices included the following statement: "We need not resolve the difficult question of when life begins. When those trained in the respective disciplines of medicine, philosophy, and theology are unable to arrive at any consensus, the judiciary, at this point in the development of man's knowledge, is not in a position to speculate as to the answer."

Fetal pain
The existence and implications of fetal pain are part of a larger debate about abortion. A 2005 multidisciplinary systematic review in JAMA in the area of fetal development found that a fetus is unlikely to feel pain until after the sixth month of pregnancy. Developmental neurobiologists suspect that the establishment of thalamocortical connections (at about 26 weeks) may be critical to fetal perception of pain. However, legislation was proposed by anti-abortion advocates that would require abortion providers to tell a woman that the fetus may feel pain during an abortion procedure if the woman's proposed abortion was at least 20 weeks after fertilization.

The 2005 JAMA review concluded that data from dozens of medical reports and studies indicate that fetuses are unlikely to feel pain until the third trimester of pregnancy. However a number of medical critics have since disputed these conclusions. Other researchers such as Anand and Fisk have challenged the idea that pain cannot be felt before 26 weeks, positing instead that pain can be felt at around 20 weeks. Anand's suggestion is disputed in a March 2010 report on fetal awareness published by a working party of the Royal College of Obstetricians and Gynaecologists (RCOG), citing a lack of evidence or rationale. Page 20 of the report definitively states that the fetus cannot feel pain prior to week 24. Because pain can involve sensory, emotional and cognitive factors, leaving it "impossible to know" when painful experiences are perceived, even if it is known when thalamocortical connections are established. In December 2022, the RCOG conducted a review of the existing literature surrounding fetal pain awareness, and concluded, "To date, evidence indicates that the possibility of pain perception before 28 weeks of gestation is unlikely."

Wendy Savage—press officer, Doctors for a Woman's Choice on Abortion—considers the question to be irrelevant. In a 1997 letter to the British Medical Journal, she noted that the majority of surgical abortions in Britain were performed under general anesthesia which affects the fetus, and considers the discussion "to be unhelpful to women and to the scientific debate". Others caution against unnecessary use of fetal anesthetic during abortion, as it poses potential health risks to the pregnant woman. David Mellor and colleagues have noted that the fetal brain is already awash in naturally occurring chemicals that keep it sedated and anesthetized until birth. At least one anesthesia researcher has suggested the fetal pain legislation may make abortions harder to obtain because abortion clinics lack the equipment and expertise to supply fetal anesthesia. Anesthesia is administered directly to fetuses only while they are undergoing surgery.

Fetal personhood
Although the two main sides of the abortion debate tend to agree that a human fetus is biologically and genetically human (that is, of the human species), they often differ in their view on whether or not a human fetus is, in any of various ways, a person. Anti-abortion supporters argue that abortion is morally wrong on the basis that a fetus is an innocent human person or because a fetus is a potential life that will, in most cases, develop into a fully functional human being. They believe that a fetus is a person upon conception. Others reject this position by drawing a distinction between human being and human person, arguing that while the fetus is innocent and biologically human, it is not a person with a right to life. In support of this distinction, some propose a list of criteria as markers of personhood. For example, Mary Ann Warren suggests consciousness (at least the capacity to feel pain), reasoning, self-motivation, the ability to communicate, and self-awareness. According to Warren, a being need not exhibit all of these criteria to qualify as a person with a right to life, but if a being exhibits none of them (or perhaps only one), then it is certainly not a person. Warren concludes that as the fetus satisfies only one criterion, consciousness (and this only after it becomes susceptible to pain), the fetus is not a person and abortion is therefore morally permissible. Other philosophers apply similar criteria, concluding that a fetus lacks a right to life because it lacks brain waves or higher brain function, self-consciousness, rationality, and autonomy. These lists diverge over precisely features confer a right to life, but tend to propose various  psychological or physiological features not found in fetuses.

Critics of this typically argue that some of the proposed criteria for personhood would disqualify two classes of born human beings – reversibly comatose patients, and human infants – from having a right to life, since they, like fetuses, are not self-conscious, do not communicate, and so on. Defenders of the proposed criteria may respond that the reversibly comatose do satisfy the relevant criteria because they "retain all their unconscious mental states". or at least some higher brain function (brain waves). Warren concedes that infants are not "persons" by her proposed criteria, and on that basis she and others, including the moral philosopher Peter Singer, conclude that infanticide could be morally acceptable under some circumstances (for example if the infant is severely disabled or in order to save the lives of several other infants.

An alternative approach is to base personhood or the right to life on a being's natural or inherent capacities. On this approach, a being essentially has a right to life if it has a natural capacity to develop the relevant psychological features; and, since human beings do have this natural capacity, they essentially have a right to life beginning at conception (or whenever they come into existence). Critics of this position argue that mere genetic potential is not a plausible basis for respect (or for the right to life), and that basing a right to life on natural capacities would lead to the counterintuitive position that anencephalic infants, irreversibly comatose patients, and brain-dead patients kept alive on a medical ventilator, are all persons with a right to life. Respondents to this criticism argue that the noted human cases in fact would not be classified as persons as they do not have a natural capacity to develop any psychological features. Also, in a view that favors benefiting even unconceived but potential future persons, it has been argued as justified to abort an unintended pregnancy in favor for conceiving a new child later in better conditions.

Philosophers such as Aquinas use the concept of individuation. They argue that abortion is not permissible from the point at which individual human identity is realized. Anthony Kenny argues that this can be derived from everyday beliefs and language and one can legitimately say "if my mother had had an abortion six months into her pregnancy, she would have killed me" then one can reasonably infer that at six months the "me" in question would have been an existing person with a valid claim to life. Since division of the zygote into twins through the process of monozygotic twinning can occur until the fourteenth day of pregnancy, Kenny argues that individual identity is obtained at this point and thus abortion is not permissible after two weeks.

Bodily rights
An argument first presented by Judith Jarvis Thomson in her 1971 paper "A Defense of Abortion" states that the fetus is a person and has a right to life, abortion is morally permissible because a woman has a right to control her own body and its life-support functions (i.e. the right to life does not include the right to be kept alive by another person's body). Thomson's variant of this argument draws an analogy between forcing a woman to continue an unwanted pregnancy and forcing a person to allow his body to be used to maintain blood homeostasis (as a dialysis machine is used) for another person with kidney failure. It is argued that just as it would be permissible to "unplug" and thereby cause the death of the person who is using one's kidneys, so it is permissible to abort the fetus (who similarly, it is said, has no right to use one's body's life-support functions against one's will).

Critics of this argument generally argue that there are morally relevant disanalogies between abortion and the kidney failure scenario. For example, it is argued that the fetus is the woman's child as opposed to a mere stranger; that abortion kills the fetus rather than merely letting it die; and that in the case of pregnancy arising from voluntary intercourse, the woman has either tacitly consented to the fetus using her body, or has a duty to allow it to use her body since she herself is responsible for its need to use her body. Some writers defend the analogy against these objections, arguing that the disanalogies are morally irrelevant or do not apply to abortion in the way critics have claimed.

Alternative scenarios have been put forth as more accurate and realistic representations of the moral issues present in abortion. John Noonan proposes the scenario of a family who was found to be liable for frostbite finger loss suffered by a dinner guest whom they refused to allow to stay overnight, although it was very cold outside and the guest showed signs of being sick. Noonan argues that just as it would not be permissible to refuse temporary accommodation for the guest to protect him from physical harm, it would not be permissible to refuse temporary accommodation of a fetus.

Other critics claim that there is a difference between artificial and extraordinary means of preservation, such as medical treatment, kidney dialysis, and blood transfusions, and normal and natural means of preservation, such as gestation, childbirth, and breastfeeding. They argue that if a baby was born into an environment in which there was no replacement available for her mother's breast milk, and the baby would either breastfeed or starve, the mother would have to allow the baby to breastfeed. But the mother would never have to give the baby a blood transfusion, no matter what the circumstances were. The difference between breastfeeding in that scenario and blood transfusions is the difference between using one's body as a kidney dialysis machine, and gestation and childbirth.

Freedom and equality
Margaret Sanger wrote: "No woman can call herself free until she can choose consciously whether she will or will not be a mother." From this perspective the right to abortion can be construed to be necessary in order for women to achieve equality with men whose freedom is not nearly so restricted by having children.

Although freedom and equality are subjective or based on one's perspectives in some contexts regarding politics, reproductive rights in policy are classified as fundamental freedoms for multiple reasons. Several reasons include but are not limited to the necessary proper analysis of public interests and policy, legislative violations when criminalizing abortion, utilizing humanitarian efforts, equality of resources and medical access, etc.

The regulation of the population's fundamental rights disregards several policy-making purposes: assessing the burdens, opportunity costs, and unintended consequences of public policies. Prioritization of such assessments benefits the essential understanding of trends regarding abortion rates and depicts an accurate evaluation of the status of women's reproductive freedoms and equality overall. The right to abortion is consequently determined by referring to either the policy method of life versus choice.

Impacts of criminalization
Some activists and academics, such as Andrea Smith, argue that the criminalization of abortion furthers the marginalization of oppressed groups such as poor women and women of color. Sending these women into the prison system would do nothing to address the social/political/economic problems that marginalize these women or, sometimes, cause them to require abortions.

Some argue that race and sex based abortions being prohibited further marginalizes oppressed groups by criminalizing those aspects of abortions. The Susan B. Anthony and Frederick Douglas Prenatal Nondiscrimination Act, proposed in Arizona in 2011, prohibited race and sex based abortions and allowed punishment for those who perform abortions based on that criteria. The bill characterized sex-based abortions as sex-based infanticide, and abortions based on the race of the fetus, or the race of the parent of the fetus, were seen as a practice that reinforces aspects of racial discrimination. Laws like these can be seen as heightening the racialization of certain issues surrounding abortion.

According to the WHO, criminalization can have a major negative impact on "the provision of quality care" by preventing medical personnel from acting out of fear of retaliation or punishment. The 2022 LTP Evaluation found that doctors were unwilling to conduct late abortions even when the legislation allowed them, preferring to refer pregnant women to clinics abroad out of anxiety for the possibility of exposing themselves to criminal culpability.

This worry even extends to an unfounded fear of being prosecuted for sending their patient to a clinic in a different country where late abortion is permitted.

Criminalization of abortion in certain states has forced women in those to cross state lines for abortion care. It was found that women living in states with more hostile abortion laws were traveling out of state for abortion care in greater percentages than women living in states with protected abortion access. This also brought about the term "abortion deserts", which are locations or counties that have no abortion facilities.

People traveling interstate for abortions decreases their home state's abortion rates, but it increases the percentages of women who will need to travel across state lines to get access to abortion care. The travel also comes with other costs, such as transportation, insurance costs, missing work, childcare, etc. that impact the people need that need this abortion care. These burdens tend to disproportionately affect people of color and impoverished people in need of reproductive healthcare.

Abortion criminalization also affects abortion providers by placing strict regulations and requirements on the providers. Targeted Regulation of Abortion Provider laws (TRAP laws) are state laws that impose annual licensing fees, personnel or facility mandates, etc. on facilities that want to continue to be abortion providers; these regulations are not imposed on other similar clinics or facilities. Some criticize these laws as excessive, with many of the regulations seeming excessive. Some states have requirements for room sizes and ceiling heights, room temperatures, procedure supervision, etc. that may make it harder for facilities to acquire licensure or hard for physicians to perform the procedure.

Inefficacy of abortion bans on reducing abortion
Research has been conducted exploring whether banning abortion actually reduces abortion rates. Researchers from the Guttmacher Institute, the World Health Organization, and the University of Massachusetts concluded that, in countries where abortions were restricted, the number of unintended pregnancies increased. The following table taken from their research shows these findings in greater detail:

Table: Rates of unintended pregnancy and abortion, and proportion of unintended pregnancies ending in abortion, by legal status of abortion for years 2015–19 UI = uncertainty interval.

Abortion safety
Even where abortions are illegal, they continue to take place, however, they are generally done unsafely, both because the need for secrecy tends to be more important than the woman's safety, and due to the lack of training and experience the person performing the abortion. When done correctly by properly trained doctors, abortion is generally safe. Where laws restrict rights to abortion, abortions are less safe and result in the deaths of 30,000 women each year.

Population planning
It has been suggested that access to abortion can help reduce human overpopulation, which is shown to be harmful to the natural environment.

Discrimination
The book Abortion and the Conscience of the Nation (1983) presented the argument that abortion involves unjust discrimination against the unborn. According to this argument, those who deny that fetuses have a right to life do not value human life, but instead, select arbitrary characteristics (such as particular levels of physical or psychological development) as giving some human beings more value or rights than others.

In contrast, philosophers who define the right to life by reference to particular levels of physical or psychological development typically maintain that such characteristics are morally relevant, and reject the assumption that all human life necessarily has value (or that membership in the species Homo sapiens is in itself morally relevant).

Some abortion opponents have argued for, and promoted legislation for, a ban on the abortion of fetuses that have been diagnosed with Down syndrome on the basis that such abortions unfairly discriminate against disabled people. Critics of these measures charge that they are hypocritical since many of their proponents appear to be unconcerned with addressing the needs of living disabled persons. In response to one such proposed measure in North Carolina, a spokesperson for Disability Rights North Carolina commented, "We would never think of using limits on someone's bodily autonomy to protect our rights."

Deprivation
The argument of deprivation states that abortion is morally wrong because it deprives the fetus of a valuable future. On this account, killing an adult human being is wrong because it deprives the victim of a "future like ours"—a future containing highly valuable or desirable experiences, activities, projects, and enjoyments. If a being has such a future, then killing that being would seriously harm the fetus and hence would be seriously wrong. According to the argument, since a fetus does have such a future, the "overwhelming majority" of deliberate abortions are placed in the "same moral category" as killing an innocent adult human being. Not all abortions are unjustified according to this argument; abortion would be justified if the same justification could be applied to killing an adult human.

Criticism of this line of reasoning follows several threads. Some reject the argument on grounds relating to personal identity, holding that the fetus is "not the same entity" as the adult into which it will develop, and thus that the fetus does not have a "future like ours" in the required sense. Others grant that the fetus has a "future like ours" but argue that being deprived of this future is not a significant harm or a significant wrong to the fetus because there are relatively few "psychological connections" (continuations of memory, belief, desire, and the like) between the fetus as it is now and the adult into which it will develop. Another criticism is that the argument creates inequalities in the wrongness of killing; as the futures of some people appear to be far more valuable or desirable than the futures of other people, the argument appears to entail that some killings are far more wrong than others, or that some people have a far stronger right to life than others—a conclusion that is taken to be counterintuitive or unacceptable.

Argument from uncertainty
Some anti-abortion supporters argue that if there is uncertainty as to whether the fetus has a right to life, then having an abortion is equivalent to consciously taking the risk of killing another. According to this argument, if it is not known for certain whether something (such as the fetus) has a right to life, then it is reckless and morally wrong to treat that thing as if it lacks a right to life (for example by killing it). This would place abortion in the same moral category as manslaughter (if it turns out that the fetus has a right to life) or certain forms of criminal negligence (if it turns out that the fetus does not have a right to life).

David Boonin replies that if this kind of argument were correct, then the killing of nonhuman animals and plants would also be morally wrong because Boonin contends it is not known for certain that such beings lack a right to life. Boonin also argues that arguments from uncertainty fail because the mere fact that one might be mistaken in finding certain arguments persuasive (for example, arguments for the claim that the fetus lacks a right to life) does not mean that one should act contrary to those arguments or assume them to be mistaken.

Slippery slope
A primary slippery slope argument used against the practice of abortion claims that the continuity of human life from conception onward requires that we do not arbitrarily deny life prior to any particular developmental milestone. For otherwise, it would be a slippery slope to the denial of adult human being's right to life because there would only be an arbitrary difference between the two cases. Thus the argument concludes that the only non-arbitrary and fair point at which to distinguish when human life has a stringent right to life and when it does not is at conception.

Another argument used by anti-abortion activists is the slippery slope argument, that normalizing abortion may lead to the normalization of other practices such as euthanasia.

Mental health
Some anti-abortion activists argue that having an abortion can cause long-term harm to a woman's emotional and physical health.

Religious beliefs
Views from different religions can often be in direct opposition to each other. Muslims typically cite the Quranic verse 17:31 which states that a fetus should not be aborted out of fear of poverty. Christians who oppose abortion support their views with Scripture references such as that of Luke 1:15; Jeremiah 1:4–5; Genesis 25:21–23; Matthew 1:18; and Psalm 139:13–16. The Roman Catholic Church, Eastern Orthodox Church and Oriental Orthodox Churches, constituting approximately 70% of Christians worldwide, believe that human life begins at conception, as does the right to life; thus, abortion is considered immoral. Most Evangelical Christians also consider abortion to be immoral. The Church of England also considers abortion to be morally wrong, though their position admits abortion when "the continuance of a pregnancy threatens the life of the mother".

Feminist arguments
Some feminists have argued that abortion does not liberate women, but gives society an excuse to not allow women who are mothers to access financial and social services that would benefit them more, such as better access to childcare, workplaces acknowledging the needs of mothers, and state support to help women reintegrate into the workplace. Further, they argue that if women did not have easy access to abortions, governments would be forced to invest more money into supporting mothers.

Other feminists oppose abortion because it distracts from other women's issues. Writer Megan Clancy argued that: "There are women who are raped and become pregnant; the problem is that they were raped, not that they are pregnant. There are women who are starving who become pregnant; the problem is that they are starving, not that they are pregnant. There are women in abusive relationships who become pregnant; the problem is that they are in abusive relationships, not that they are pregnant." Some feminists have argued that abortion is inconsistent with feminist principles of justice and opposition to discrimination and violence. Feminists for Life, an anti-abortion feminist organization, argued that: "We believe in a woman's right to control her body, and she deserves this right no matter where she lives, even if she's still living inside her mother's womb." Some feminists see abortion as an excuse for men to not take responsibility for sexually exploiting women because abortion prevents men from having to take care of any children the woman has as a result of the sexual intercourse.

Mexico City policy
The Mexico City policy is a policy of the US federal government concerning US funding for abortions outside of the US. Known by critics as the "global gag rule", the policy required any non-governmental organization receiving U.S. government funding to refrain from performing or promoting abortion services in other countries. This had a significant effect on the health policies of many nations across the globe. The Mexico City policy was instituted under President Reagan, suspended under President Clinton, reinstated by President George W. Bush, suspended again by President Barack Obama on 24 January 2009 and re-instated once again by President Donald Trump on 23 January 2017. In 2021, President Biden rescinded the Mexico City policy.

Public opinion
A number of opinion polls around the world have explored public opinion regarding the issue of abortion. Results have varied from poll to poll, country to country, and region to region, while varying with regard to different aspects of the issue.

In North America, a December 2001 poll surveyed Canadian opinion on abortion, asking in what circumstances they believe abortion should be permitted; 32% responded that they believe abortion should be legal in all circumstances, 52% that it should be legal in certain circumstances, and 14% that it should be legal in no circumstances. A similar poll in April 2009 surveyed people in the United States about U.S. opinion on abortion; 18% said that abortion should be "legal in all cases", 28% said that abortion should be "legal in most cases", 28% said abortion should be "illegal in most cases" and 16% said abortion should be "illegal in all cases". A November 2005 poll in Mexico found that 73.4% think abortion should not be legalized while 11.2% think it should be.

A May 2005 survey examined attitudes toward abortion in 10 European countries, asking respondents whether they agreed with the statement, "If a woman doesn't want children, she should be allowed to have an abortion". The highest level of approval was 81% (in the Czech Republic); the lowest was 47% (in Poland). In 2019, 58% of Poles supported abortion on request up to the 12th week of pregnancy.

A 2021 study showed that abortion providers faced discrimination and termination in the workplace, death threats, harassment, and impacts to their private and personal lives for them and their families. The same study shows that the providers continue to work in the field due to their commitment to women’s health and pro-choice cause.

As of 2022, after the overturn of Roe vs Wade by the Supreme Court, a Wall Street Journal poll conducted in March showed that 60% of voters believed that abortion should be legal in most cases, an increase of 5% earlier in the year. 29% of participates believed it should be illegal in most cases, except for endangerment of the woman, rape, or incest. Lastly, 6% said it should be illegal in all cases, down from 11% earlier that same year. A Pew Research Center poll showed similar results, even in states that had implemented complete bans on abortion.

African countries have different views based on region and cultural influences. In Kenya, both male and female opinions show that abortion is frowned upon, due to embedded social norms that stem from religious and cultural beliefs. While younger generations are starting to normalize abortions, limited access to procedure, high costs, and lack of information still leads to unsafe abortion practices. In Nigeria, the abortion laws are even stricter. Rather than being obstrasized by the community, abortion in Nigeria can lead to life imprisonment for both the abortion seekers and those who assist them. The country’s government has outlawed abortion in all cases except to save the life of the pregnant person. In a survey of women, many cited religion, incomplete abortion, future infertility, and death as a fear when seeking abortion in Nigeria.

Of attitudes in South America, a December 2003 survey found that 30% of Argentines thought that abortion in Argentina should be allowed "regardless of situation", 47% that it should be allowed "under some circumstances", and 23% that it should not be allowed "regardless of situation". A more recent poll now suggest that 45% of Argentineans are in favor of abortion for any reason in the first twelve weeks. This same poll conducted in September 2011 also suggests that most Argentineans favor abortion being legal when a woman's health or life is at risk (81%), when the pregnancy is a result of rape (80%) or the fetus has severe abnormalities (68%). A March 2007 poll regarding the abortion law in Brazil found that 65% of Brazilians believe that it "should not be modified", 16% that it should be expanded "to allow abortion in other cases", 10% that abortion should be "decriminalized", and 5% were "not sure". Later a poll made in September 2022 found that the 70% of Brazilians where against abortions, 20% where in favor of it, 8% where neither in favor or against it, and 2% didn't know what to answer. A July 2005 poll in Colombia found that 65.6% said they thought that abortion should remain illegal, 26.9% that it should be made legal, and 7.5% that they were unsure.

According to global surveys in 2023 and 2024, the right to access legal abortion is widely supported. There is particularly strong widespread support for legal abortion in Europe.

Effect upon crime rate
A theory attempts to draw a correlation between the United States' unprecedented nationwide decline of the overall crime rate during the 1990s and the decriminalization of abortion 20 years prior.

The suggestion was brought to widespread attention by a 1999 academic paper, The Impact of Legalized Abortion on Crime, authored by the economists Steven D. Levitt and John Donohue. They attributed the drop in crime to a reduction in individuals said to have a higher statistical probability of committing crimes: unwanted children, especially those born to mothers who are African American, impoverished, adolescent, uneducated, and single. The change coincided with what would have been the adolescence, or peak years of potential criminality, of those who had not been born as a result of Roe v. Wade and similar cases. Donohue and Levitt's study also noted that states which legalized abortion before the rest of the nation experienced the lowering crime rate pattern earlier, and those with higher abortion rates had more pronounced reductions.

Fellow economists Christopher Foote and Christopher Goetz criticized the methodology in the Donohue-Levitt study, noting a lack of accommodation for statewide yearly variations such as cocaine use, and recalculating based on incidence of crime per capita; they found no statistically significant results. Levitt and Donohue responded to this by presenting an adjusted data set which took into account these concerns and reported that the data maintained the statistical significance of their initial paper.

Such research has been criticized by some as being utilitarian, discriminatory as to race and socioeconomic class, and as promoting eugenics as a solution to crime. Levitt states in his book Freakonomics that they are neither promoting nor negating any course of action—merely reporting data as economists.

Breast cancer hypothesis
The abortion–breast cancer hypothesis posits that induced abortion increases the risk of developing breast cancer. This position contrasts with some scientific data that abortion does not cause breast cancer.

In early pregnancy, levels of estrogen increase, leading to breast growth in preparation for lactation. The hypothesis proposes that if this process is interrupted by an abortion – before full maturity in the third trimester – then more relatively vulnerable immature cells could be left than there were prior to the pregnancy, resulting in a greater potential risk of breast cancer. The hypothesis mechanism was first proposed and explored in rat studies conducted in the 1980s.

Minors
Many states require an unmarried minor to have parental consent or notification before an abortion is allowed to happen. These are known as parental involvement laws. The parents or guardians of the pregnant person must be consulted before an abortion is to be induced legally. States with these laws generally have different degrees of involvement and enforcement. A judge can be consulted to overrule a parent in the event the pregnant person is denied abortion services.

Studies have shown that these the required notification laws have not affected the probability that teenagers will engage in sexual activity or the demand for abortion. The rate of abortions for minors decreases in states with parental involvement laws by nearly 13 to 22 percent, however, it raises the rate for out-of-state abortions such in the case of Mississippi and Missouri.

Teenagers are shown to seek abortion across state lines to areas with less restrictive abortion laws to bypass these preventative methods. In the United States, 37 states require the parent to have knowledge while only 21 of those states need one parent to consent. Certain states have an alternative answer to the involvement of the parent by getting the judicial system involved with a judicial bypass. In those states, minors can get permission from the judge if parents are not willing to do so or if they are absent from their lives.

There are different guidelines for minors and abortions in every country. In most of Europe, all persons that are capable of judgment enjoy medical privacy and can decide medical matters on their own. The capability of judgment does not come at a defined age, however, and is dependent on how well the person is able to understand the decision and its consequences. For most medical procedures, the capability of judgment usually sets in at ages 12 to 14.

Parental involvement is one of the most common methods of restricting abortion, along with Medicaid funding restrictions, mandatory delay laws, licensing fees for abortion providers, and mandatory counseling laws.

Marshall Medoff argued that parental involvement laws are largely ineffective at reducing abortion demands. One cause could be that some states do not require parental involvement, so out-of-state abortions could meet the demands.