Amniotic sac

The amniotic sac is a fluid-filled, transparent membrane that surrounds and cushions a developing fetus during pregnancy. It provides a safe environment, protecting the baby from external shocks and infections, and allows room for movement, which is important for muscle development. The sac is filled with amniotic fluid, which is produced by the mother's body and the fetus. It begins forming early in pregnancy and remains until about labor, when it usually breaks or is deliberately ruptured. Overall, the amniotic sac is vital for protecting and supporting fetal growth and development.