Twins - Question about membrane

Hi ladies, I just have a question regarding the membrane between twins.  The doctors said they think that the twins are identical because they cannot see a membrane between them.  They share the same placenta (thus at risk for TTTS).  They are still not sure if they are identical or if they implanted that close together.  I was 8w at my first u/s and they said they didn't see a membrane, but who's to say there wasn't one.  The doctor said it could be too early to tell.  The twins were one on top of the other - could this be a reason for not really being able to see a membrane?

I am worried sick that the twins are mo/mo twins - because the success rate is not good.  Anybody have an early u/s and not see a membrane - only to have one at 12 weeks and find out they are both in different sacs?

Any advice / stories would be greatly appreciated.

 I've known at least 2 people personally who didn't get their mono/di confirmation until after 10wks. It is sometimes difficult to see so early. 

Congratulations on your twin pregnancy, I too have identical twins!! My first u/s when we discovered I was carrying twins was at 10 weeks and the membrane was very thin and wispy like, but it was visible. In the sonogram it's hard to see, but during the u/s we could see it although it was very thin. Maybe if I would have had an earlier u/s, the membrane may not have been detected, who knows.

Anyway, I've read on a lot of the forums about twins and there have been multiple ladies with the same issue only to go back at a later date and find the membrane. It's great that they're aware of the posibility of mo/mo twins and the risks associated with them so you'll get optimal care.

thanks!!  I had my 12 week ultrasound - and the found the membrane!!  Could not be happier!  Now I am just hoping for my boys... but I guess as long as they are happy and healthy, I shouldn't complain.

I am glad you got good news !! My first ultrasound at 14 weeks showed a very visible membrane but later in my pregnancy you couldn't even see it !

That's wonderful news, congratulations!! I hope you get your boys!!

That is wonderful news, Sending you all my blue dust

Oh fab fab fab news!!! so happy. come back and tell us if they are boys!