1. Your question concerns two topics: the rupture of the water bag (amniotic sac) before labor begins, and premature labor. Let’s address these two separately. In the movies, labor always seems to begin with the breaking of the water bag. But labor actually begins this way for only 10 to 15 percent of women. When it does, it usually happens at full term, between 37 and 41 weeks. Labor seldom begins before 37 weeks. But when it does, it often begins with rupture of the membranes. Sometimes, there has been a mild infection in the uterus and amniotic sac. This condition, called chorioamnionitis, can be difficult to diagnose and treat. In other cases, undiagnosed cervical dilation has caused the amniotic sac to break. In still others, the amniotic membrane was weak for some reason.

    The fact that your water bag ruptured prematurely in your first pregnancy does not necessarily mean it will this time. Although both the premature birth of your first baby and the premature labor you have experienced in this pregnancy increase the likelihood that you’ll deliver prematurely again, the terbutaline and bed rest appear to be working well for you. Hang in there for just a few more weeks!

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Ask Tori RN®, by registered nurse and resident author of The Joy of Pregnancy, is a helpful and reassuring resource for parents-to-be.