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Learn about the stages of human embryonic and fetal development from fertilization to birth, with a table of gestational and embryonic ages. See illustrations of the changes in size, shape, and organs of the embryo and fetus at different weeks.
Prenatal development is the development of the embryo and fetus before birth. Learn about fertilization, implantation, embryogenesis, fetal development, and the factors that affect prenatal growth and health.
Learn about the processes of fertilization, cleavage, blastulation, gastrulation, neurulation and organogenesis that occur during the first eight weeks of human embryogenesis. See diagrams, images and references of the stages of human embryo formation.
Pregnancy is the time during which one or more offspring develops inside a woman's uterus. Learn about the signs, symptoms, causes, diagnosis, treatment, and outcomes of pregnancy, as well as the terminology and statistics related to it.
Gestation is the period of development of an embryo or fetus inside a viviparous animal. Learn about the gestation period, trimesters, and factors affecting human pregnancy, as well as the diversity of gestation in other animals.
Childbirth, also known as labour, parturition and delivery, is the completion of pregnancy where one or more babies exits the internal environment of the mother. Learn about the signs, symptoms, pain, methods and risks of childbirth from this comprehensive article.
Fetal viability is the ability of a human fetus to survive outside the uterus, which depends on factors such as birth weight, gestational age and medical care. The limit of viability is around 24 weeks, but varies by country and case. Learn more about the history, beliefs and laws of fetal viability.
Learn how the nervous system forms, develops, and changes in humans from embryo to adulthood. Explore the mechanisms, processes, and stages of neural induction, differentiation, migration, axon guidance, synaptogenesis, and synaptic plasticity.
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