The bag of waters - or amniotic sac - is a bag or "membrane filled with fluid that surrounds your baby in your uterus during pregnancy." The bag of waters is very important to your baby's health.

What makes twins fraternal? Find out how much these siblings share from conception on, and how similar or different they ...

Amniotic fluid is the fluid that surrounds a fetus during pregnancy. When the amniotic sac breaks, known as the rupture of ...

Viewer discretion is advised. A video from a Spanish hospital captures the moment a baby is born within the amniotic sac, an occurrence that only happens 1 in every 80,000 births. It is also known ...

The amniotic sac, commonly called the bag of waters, sometimes the membranes, is the sac in which the embryo and later fetus develops in amniotes. It is a thin but tough transparent pair of membranes ...