placenta

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Close-up illustration of a human fetus inside the womb, showing the developing baby holding the umbilical cord in a warm, reddish environment.

placenta: Media

human and animal

Videos

Close-up illustration of a human fetus inside the womb, showing the developing baby holding the umbilical cord in a warm, reddish environment.

How a human embryo develops into a fetus

Learn about human embryonic and fetal development from fertilization to birth.

Video: Encyclopædia Britannica, Inc.

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