1 placenta, 2 sacs

eyelovemascara

I had an u/s today with my high risk doctor and he walked into the room and said "You're having identical twins" like he was 100% sure of it! I was so shocked because everything I had read said that you can't be sure until they are born, unless of course you have a boy/girl. Apparently there are two sacs, and one placenta. He said that if it were fraternal twins the "membrane"(?) would have been thicker, but it was thin so he knows based on that picture that they are identical. Anyone else have this happen?

I had no idea they could tell so early on! Excited nonetheless!

Temp159135562506975

chances are they are probably ID if the membrane is truly that thin- but you can't be 100% sure until they are born.

placentas can fuse together and look like one... and US's can be off - so it's never 100% while still pg if there are 2 sacs - but it sounds like they probably are ID, chance wise at least

MamaCrystal

Yes, the only way to know if they're identical early on is if the twins are sharing a chorionic sac (placenta).  A very thin membrane between them is the tell-tale sign : )  I also had mono/di identicals.

Congrats and welcome to the board!!

lkates921

yes, they most likely are. i have mono/di twins and they only had one placenta and two sacs and the membrane is veryyyy thin between them. When i got to be 19 weeks after my level two u/s i had them every other week so they could check the growth (since there is a higher risk for twin-twin transfusion syndrome) and monitor the fluid level and i had one instance where it took them almost an hour to find the membrane so they could measure the fluid lol i was happy i got to see my babies twice a month:) you'll most likely be having a lot of ultrasounds! lol congratsss!!

Pipigirl

Same thing here.  There was 1 placenta, two sacs, and a very thin membrane. My doc said identical too.  I also had ultra sounds every 2-3 weeks to check for TTTS. All those ultrasounds were one of the best parts of the pregnancy! Congrats! 

Desired11

Yes, we are also having mono/di twins (2 sacs with a thin membrane and 1 placenta). They questioned the fact that maybe we had mono/mono until 19 weeks.  They couldn't see the thin membrane between them.  At 19 weeks they told me they were identical, for sure! I now have u/s every other week...it's nice to see the babies! However, we also have a lot of risk with TTTS. My baby B is always making the u/s VERY LONG!! He continues to flip about that they cannot get the correct readings. Congrats!! and Good Luck with everything!!

jackieb3858

I had the same and they are identical.

mamafraix

We have the same situation and the doctor said he was 99% sure they are identical.

flutepharm87

Same thing here. The membrane between our boys is so paper-thin that it's hard for the doctors and u/s techs to find. At first, since the tech who discovered twins couldn't find the membrane, they thought the boys were in the same sac. At 22, almost 23 weeks, it's a blink and miss you deal with the membrane between the two Congrats!

PianoPlayingSarah

My triplets were discovered during a routine u/s at 17 weeks.  At that point and going forward, we were always told that they were identical.  They shared one placenta and one outer sac but had very thin membranes separating them. 

The placenta was tested after they were born and it was confirmed to be just one placenta.  And just looking at my girls - you can obviously tell that they are identical.

mrsbaker1128

We're also having mono-di twins! The u/s tech told us as soon as she saw two that they were identical. It's amazing what they can tell these days!

Congrats!