This narration describes a normal 28 day menstrual cycle. It covers the main hormones that are involved in the release of an egg from the ovary. There is a discussion about how hormones control menstruation if the egg is not fertilized and how they support pregnancy if the egg is fertilized by a sperm.

This narrated animation shows how an egg from the ovary that, once fertilized, implants in the womb. This fertilized egg (zygote or embryo) is supported by the endometrial lining of the uterus. The video continues to describe how the fetus develops and interacts with the amniotic fluid and the womb.