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Q&A: What is the amniotic sac?

What is the amniotic sac, and what exactly is it there for?

Re: What is the amniotic sac, and what exactly is it there for?

The Bump Expert

The amniotic sac, together with the amniotic fluid it contains, is the same thing as your waters or bag of waters (you know, the one that breaks when you go into labor). The sac consists of two membranes (known as the amnion and the chorion) that form baby's home while in your belly. This keeps baby warm, safe and surrounded by cushiony liquids.

These membranes usually rupture when it's time for baby to make an arrival, and may trickle or gush out of your body, signaling that it's high time to give your doc or midwife a call. In certain cases, if your amniotic sac has not broken and your doctor sees the need to induce labor, she may choose to rupture them with a special tool in order to start contractions and get the show on the road. Most women will go into labor within a few hours after this is done. However, if your amniotic sac gives way well before labor beings, other methods of induction might be used. (Baby can't hang around for too long sans amniotic fluid without risk of infection.)

Nestpert: American College of Obstetrics and Gynecologists. Your pregnancy and birth. 4th ed. Washington, DC: ACOG; 2005.

Erin Walters

re: Q: Possible old clot between amnion and chorion @ 11 wks

At approx 6 weeks I had a small subchorionic hemmorhage. I bled for 2 hours , then it was over and the s.h. was not seen on u/s again. At 11 weeks I bled (gushed)bright red blood and passed some very large clots (one the size of my hand). I thought I miscarried, but the next AM the baby was seen on u/s doing fine. I had a f/u w/ perinatologist who said it looks like I have an old, large clot between the amnion and chorion. Could the passing of those huge clots be related to the hemmorahage or the new clot? Where would all that stuff come from? What does this clot between the amnion and chorion mean for the baby? What if the amnion and chorion are unable to fuse beacuse of this clot?

louandstacy |