Amniotic fluid usually ruptures when pregnant women begin to experience uterine contractions to give birth to the baby. However, there are times when the membranes rupture early, which can lead to serious complications. During pregnancy, the fetus in the womb is protected and surrounded by a membrane filled with fluid called the amniotic sac. Shortly before the fetus or baby is born, the amniotic sac will rupture and a liquid called amniotic fluid will come out through the vagina. Generally within 24 hours after the amniotic sac ruptures, the baby will be born. But if after that time the baby is not born, or the membranes rupture before the womb is 37 weeks old, then the condition is said to be premature rupture of the membranes. Causes of Premature Amniotic Disease Premature rupture of membranes usually causes premature labor, aka babies forced to be born prematurely. Premature rupture of membranes can be more risky if there are several things like the following: Infection of t...