question about di/di ID twins

When you were having your ultrasounds and stuff, were you given any indication that they were more likely to be ID rather than same gender fraternal twins. Is there any truth to what the sono tech keeps telling me that because the septum is so thick it's highly unlikely that they will be ID?

 

From what I understand is that you can only know for sure they are identical. Sharing a placenta or in the same sac. If the egg splits within the first 48 hours then it's still in the fallopian (sp) tube and therefore the now two separate embryos travel to the uterus separetly and implant in different spots. But fraternal twins are a little more common than identical and if there was IVF, help with fratility treatments, or fraternal twins run in your family then it's most likely fraternal. Otherwise you won't know until they are born or know their gender. If it's boy/girl than they are fraternal. This website might help you to understand http://www.babyzone.com/loadpage/slideshow...baby-twins&.

 

I was always told that I would not know until birth if my girls were identical or fraternal, but that chances were greater that they were fraternal. The only way we would know if they were frat before birth would be if an u/s revealed they were boy/girl. They tested the placentas and the babies before we left the hospital, and they are identical.

 

My id boys were diamniotic, but shared a large placenta, which the ultrasound tech/doctors were not sure if it was two close together or one large one. After they were born, they sent the placenta to pathology who determined it was one (and therefore my boys were identical). The first ultrasound we had, the doctor was able to see that the septum was thin, and on that basis, predicted our boys were identical. But, he did say that it wasn't possible to be 100% sure until they were born and we could do a DNA test.

My understanding is that if the septum is thin, it's a good clue that the babies are identical, but it's not foolproof, and is a subjective thing (you are relying on the tech's experience/judgment). Your babies might still be identical, but you won't be able to know for sure one way or the other until they are born and you can do a DNA test.

 

I agree that the only way for you to know 100% is to wait until birth. They will either look different OR you will have to do a DNA test. My babies are frats (they look different) and the septum was thin.

 

my peri and ob seem to think my boys are frat they are in separate sacs and they don't share a placenta there's a very nice sized membrane in between them ... but on the other hand the peri said we wont know 100 % until they come out!!

 

We had to test to know forsure! And ours are di/di identical boys. They never said anything about a septum.

 

QUOTE(kumphort @ Jan 2 2009, 08:55 AM) [snapback]1130050[/snapback]
When you were having your ultrasounds and stuff, were you given any indication that they were more likely to be ID rather than same gender fraternal twins. Is there any truth to what the sono tech keeps telling me that because the septum is so thick it's highly unlikely that they will be ID?


I have di/di ID's. I had multiple u/s techs tell me there is NO WAY my guys would be ID since they were so far apart and one was posterior and one was anterior. I proved them wrong though and my guys are ID per their DNA test.

 

Fundal anterior and low-lying posterior di/di IDs here. They don't get any more distant than that! I can't recall who it was but I remember a post where someone was told she was having ID twins and then they changed their minds after the 20-week ultrasound revealed a boy and a girl and 4 membranes between them. Close implantation doesn't mean they're ID any more than distance means they're not. Sure, there are odds and I'm sure that IDs are close more often than frats but you really won't know until after they're born.

 

Thanks everyone

I think these medical people like to make assumptions based on what they think are medical facts, when really the body doesnt always play by the rules.

 

My first ultrasound at 7 weeks confirmed id twins as they were in one gestational sac but had their own amniotic sac.

 

QUOTE(PJ @ Jan 2 2009, 10:58 PM) [snapback]1130847[/snapback]
I have di/di ID's. I had multiple u/s techs tell me there is NO WAY my guys would be ID since they were so far apart and one was posterior and one was anterior. I proved them wrong though and my guys are ID per their DNA test.


Same here! I was told my entire pregnancy there were frats. They "had" to be. Once they came out the nurses said, "There is no way they are fraternal." We still thought they were because even then the Dr. were saying they were. We eventually had a DNA test done and they are ID. I should have saved my money, however, because my DH and I are the only ones that can tell them apart! My parents still have no idea!

 

I was told through the pregnancy that they were ID, with a shared placenta and a very thin dividing membrane. But within a few hours of birth, both DH and I were convinced otherwise. They are in fact frats who have nothing in common - eye color, hair color or texture, blood type, etc. We had a fused placenta that even the peri thought was one.

 

My ob seemed to think my girls are frats but they are in separate sacs and they don't share a placenta there's a very nice sized membrane in between them, so when they where born I had them tested and they are ID.

 

My twins were di/di and we did testing and it came back that they were identical.

 

I was told mine where ID and then when they were born they were frat...

 

At our sneak peek u/s at around 9 weeks, the doc said they looked like ID's but at every u/s after that there were clearly two placentas & two sacs and the tech assured me that they could be nothing but fraternal. We had them tested not long after they were born though and they are ID.

Like the PP's have mentioned, it just depends on when the egg splits. The super early splitters are the Di/Di's.