Twins- One Sac

hayjune

Hello all! I went for my first ultrasound Monday and we discovered that we are having twins! The doctor seems to think they are in one sac. Of course I have turned to Google for more information and I've managed to freak myself out. Does anyone have any experience with twins in one sac?

PinkinProvence

Congratulations!  It is probably very early and a later US may very well find a membrane between the babies.  Did they see two placentas?  The terminology for twins who share a sac and placenta are mono/mono (mo/mo).  If there are two sacs and two placentas the term is di/di.  There are many helpful women on this board who have experience with both (and the third type mo/di.)

amy1007

How far are you? At 6 and 7 weeks our Ob could not see membrane separating our id twins. At 12 weeks at the mfm we saw that thin wispy line separating them. Mo/di. It's so hard to see early. Gl and don't worry!

daisy19782011

I am 31+ weeks with momo twins. ..1 sac 1 placenta. .no membrane. It had been very emotional and very scary although I have really had very little complicaton. Take it 1 day at a time....gl!

Mrs. Alice

If you had a early u/s it's too soon for your Dr. to diagnose them with as one amniotic sac (mo/mo).  Good luck!  There's been many on here that were told that and they later found a dividing membrane.  Mo/mo is rare but it's definitely possible to have a good outcome, just riskier and more monitoring.

tiffwedd

My boys are mo/di, 1 sac, 1 placenta with a membrane in between.  Take it one day and one appointment at a time.  Take care of yourself and try not to read too much.  We made it to 34 weeks with no complications and had very healthy 5 lb dudes who are now 25 lb 10 month olds.

jezebel57

mine share a placenta but each have their own amniotic sac separated by a thin membrane.  (are mono/di)

they are higher risk but you will be monitored closely and most pregnancies turn out very well!  congratulations!