Placenta

A tissue that connects the developing baby to the uterus.

Amniotic Fluid

Liquid that surrounds and protects the developing baby in the uterus.

Umbilical cord

A long cord that connects the baby to the placenta.

Embryo

The name of the developing baby from about the third week of pregnancy through the eighth week.

Fetus

The stage of development that begins around the eighth or ninth week of pregnancy and lasts until birth.