I very practical guide

Childbirth During childbirth the baby lies in the mother's uterus with his head pointing down t

How the Body Works Female Reproductive Organs The female sex organs lie in the lower abdomen, where

How the Body Works Immature Male Sex Cells Immature sex cells, or spermatogonia, in the testes divi

animated description of fertilization

Watch an animation that shows how the human egg is produced and fertilized.

Medical animation of egg fertilization from www.medflix.com