User:NuclearWarfare/Abortion notes sandbox

Abortion is the termination of a pregnancy by the removal or expulsion of a fetus or embryo from the uterus, resulting in, or caused by its death. An abortion can occur spontaneously due to complications during pregnancy, or can be induced, in humans and in other species. In the context of human pregnancies, an abortion may be referred to as either therapeutic or elective. The term abortion most commonly refers to the induced abortion of a human pregnancy; spontaneous abortions are usually termed miscarriages.

Abortion, when performed in the developed world in countries where the procedure is legal, is among the safest procedures in medicine. However, unsafe abortions (those performed by persons without proper training or outside of a medical environment) result in approximately 70 thousand maternal deaths and 5 million disabilities per year globally. An estimated 42 million abortions are performed globally each year, with 20 million of those performed unsafely. Forty percent of the world's women are able to access therapeutic and elective abortions within gestational limits.

Induced abortion has a long history and has been facilitated by various methods including herbal abortifacients, the use of sharpened tools, physical trauma, and other traditional methods. Contemporary medicine utilizes medications and surgical procedures to induce abortion. The legality, prevalence, cultural status, and religious status of abortion vary substantially around the world. In many parts of the world there is prominent and divisive public controversy over the ethical and legal issues of abortion. Abortion and abortion-related issues feature prominently in the national politics in many nations, often involving the opposing pro-life and pro-choice worldwide social movements (both self-named). Incidence of abortion has declined worldwide as access to family planning education and contraceptive services has increased.

Induced
Approximately 205 million pregnancies occur each year worldwide. Over a third are unintended and about a fifth end in induced abortion. A pregnancy can be intentionally aborted in several ways. The manner selected often depends upon the gestational age of the embryo or fetus, which increases in size as the pregnancy progresses. Specific procedures may also be selected due to legality, regional availability, and doctor-patient preference.

Reasons for procuring induced abortions are typically characterized as either therapeutic or elective. An abortion is medically referred to as a therapeutic abortion when it is performed to save the life of the pregnant woman; prevent harm to the woman's physical or mental health; terminate a pregnancy where indications are that the child will have a significantly increased chance of premature morbidity or mortality or be otherwise disabled; or to selectively reduce the number of fetuses to lessen health risks associated with multiple pregnancy. An abortion is referred to as an elective or voluntary abortion when it is performed at the request of the woman for non-medical reasons.

Spontaneous
Spontaneous abortion, also known as miscarriage, is the unintentional expulsion of an embryo or fetus before the 20th to 22nd week of gestation. A pregnancy that ends before 37 weeks of gestation resulting in a live-born infant is known as a "premature birth" or a "preterm birth". When a fetus dies in utero after viability, or during delivery, it is usually termed "stillborn". Premature births and stillbirths are generally not considered to be miscarriages although usage of these terms can sometimes overlap.

Between 15% and 30% of known pregnancies end in clinically apparent miscarriage, depending upon the age and health of the pregnant woman. Over 80% of spontaneous abortions occur within the first 12 weeks of pregnancy. Most occur very early in pregnancy, in the majority of cases they occur so early in the pregnancy that the woman is not even aware that she was pregnant.

The most common cause of spontaneous abortion during the first trimester is chromosomal abnormalities of the embryo/fetus, accounting for at least 50% of sampled early pregnancy losses. Other causes include vascular disease (such as lupus), diabetes, other hormonal problems, infection, and abnormalities of the uterus. Advancing maternal age and a patient history of previous spontaneous abortions are the two leading factors associated with a greater risk of spontaneous abortion. A spontaneous abortion can also be caused by accidental trauma; intentional trauma or stress to cause miscarriage is considered induced abortion or feticide.