User:Amay22/Puppy

Prenatal Development
Dogs go through prenatal development before they are born, just like all animals do. The germinal stage, the embryonic stage, and the fetal stage are the three phases that make up this development.

The first stage of prenatal growth in dogs is known as the germinal stage, which starts at fertilization and lasts for about two weeks. The fertilized egg, also known as the zygote, travels through the fallopian tube to the uterus during this period while undergoing rapid cell division. The placenta, which will feed the growing puppy, is formed once the zygote enters the uterus and settles in the uterine wall.

The embryonic period lasts from about day 14 of pregnancy until day 28 or so. With the growth of important organs and body systems, the embryo starts to take on a more recognizable shape at this stage. This involves the development of the digestive system, brain, heart, and lungs. An ultrasound can show the embryo at this time, which is about the size of a grape.

Around day 28 is when the fetal period starts, and it lasts until day 63, when the puppy is born. The puppy's organs and systems continue to develop and refine during this period of growth and development. It also involves the ability to control its own body temperature as well as the maturation of the senses, such as hearing and sight. The puppy is completely developed and prepared for birth by the time the fetal period is over.

There are several factors that can impact prenatal development in dogs. Exposure to toxins or disease can also impact prenatal development, as can genetic factors. Viral and non-infectious causes for pregnancy losses include common viruses, with consequences on reproduction. Canine herpesvirus (CHV1) is a common virus in female dogs. Non infectious causes include Fetal defects and congenital abnormalities, neoplasia, trauma, endocrine abnormalities, and drugs