question about my doc?

Okay soooooo I have been following the ID/FR thread, and I was just wondering at my 12 week ultrasound the doctor said "he didnt know" at that point what our twins were, then again at 20 weeks the hubby asked and he said there was no knowing, although he did mention the 2 out of 3 are fraternal, (duh, like I didn't already know this).. Do you think there is any reason he isn't looking or guessing? Maybe he just can't tell or he just waits until birth to tell, I dunnno, but it seems like alot of you already know..

No biggie, just another surprise I guess.. I was more or less wondering so we know if we are at risk for TTTS. Everything is great though!

 

Your babies are probably in two sacs with two placentas. The only way to tell if they are id/fr is if they have testing when they are born. If they share a placenta, they are probably ID, but sometimes two placentas will fuse together. Ask the u/s tech how many placentas there are. She/He will probably show you where they are. HTH!

 

I agree with the previous poster. It sounds like your babies are in 2 placentas (like mine are). So no, I don't know what mine are either. Just been told that there's 30% chance they're identical and 70% chance they are fraternal. There is no way to know now. And no way for your doctor to guess!

I am having 2 boys so we'll see if they have the same blood types at birth and whether the look alike before deciding whether to pay for the DNA test. If they have different blood types or if one looks like me and one looks like my hubby, then we'll know that they are fraternal for sure!

Sorry but you'll just have to wait and see.

Cary

 

The only way I knew I was having fraternal is because I had a 6 week ultrasound and they were in completely seperate sacs. Sorry this doesnt help you but it kind of looks like on your little u/s pic in your signature block that there is a line between them. If that is so, it is hard to see that line early on and as the babies grow you can see it more and more. They thought I had mo/mo twins but then I asked the lady to check again and with some manipulation she found the line. Now you can see it so easily and it gets measured regularly.

 

QUOTE(b/gtwinmom07 @ Sep 6 2007, 08:01 AM) [snapback]394956[/snapback]
The only way I knew I was having fraternal is because I had a 6 week ultrasound and they were in completely seperate sacs. Sorry this doesnt help you but it kind of looks like on your little u/s pic in your signature block that there is a line between them. If that is so, it is hard to see that line early on and as the babies grow you can see it more and more. They thought I had mo/mo twins but then I asked the lady to check again and with some manipulation she found the line. Now you can see it so easily and it gets measured regularly.


Sorry, but just because they are in separate sacs does not mean that they are necessarily fraternal. There is still a 25 to 30% chance that they are identical. About 30% of identical twins end up in different placentas because the fertilized egg separated very early on.

ETA: It looks like you are having b/g twins from your screen name so obviously that would mean fraternal for you!

 

I agree, it sounds like you've got two babies, two sacs & two placentas. If that's the case, then he's correct, there's just no way to know. Even at birth, the only definitive way to know is with dna testing. If you're concerned about TTTS, I'd suggest you just ask him about it. Ask how many placentas there are and if he feels your babies are at risk for TTTS. Then you won't have to wonder so much

 

QUOTE(caryanne07 @ Sep 6 2007, 08:22 AM) [snapback]394973[/snapback]
Sorry, but just because they are in separate sacs does not mean that they are necessarily fraternal. There is still a 25 to 30% chance that they are identical. About 30% of identical twins end up in different placentas because the fertilized egg separated very early on.

ETA: It looks like you are having b/g twins from your screen name so obviously that would mean fraternal for you!


Oh! Didn't know that. Well I also had two seperate embryo's put back during my IVF cycle and that is what the dr told me when I went in for my 6 wk u/s.

 

The only way to truly know, unless they share a sac and placenta is to get them tested after birth. However, if your boys are born with different blood types that will tell you they are Frat. If they have the same blood type you will need to get them tested to be sure.

But if he can't tell, I would say they are in separate sacs/2 placentas, but that still could be ID.