prenatal development: Media
physiology
Videos
How a human embryo develops into a fetus
Learn about human embryonic and fetal development from fertilization to birth.
Images
embryos of different animals
The embryos of many animals appear similar to one another in the earliest stages...
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first stages of human development
Early stages of human development. (A–D) Cleavage of the ovum. (E–F) Blastocyst development.
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implanted human embryo
Development of the human embryo, shown as half-section depictions of embryos implanted...
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human embryonic development
Development of the human embryo at 23 days.
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human embryonic development
Development of the human embryo at 18 days, at disk or shield stage, shown in (left)...
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formation of the neural tube in prenatal development
Cross section of the embryonic disk, showing formation of the neural tube in prenatal...
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umbilical cord formation
Human embryological and fetal development. An embryo of six weeks is depicted within...
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embryonic development
The state of development of a human embryo at the seventh week of pregnancy.
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fetal growth
Growth of the human fetus from the fourth month to the ninth month of pregnancy.
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human fetal brain; prenatal development
Profile of the brain of a human fetus at 10 weeks.
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motor neuron
Anatomy of a nerve cell. Structural features of a motor neuron include the cell body,...
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external genitalia
Differentiation of the external genitalia in the human embryo and fetus.
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