Does monochorionic diamniotic twin pregnancy always result to identical twins?

Jo - posted on 04/29/2010 ( 14 moms have responded )

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I gave birth to my twins last year and they shared same placenta but they had separate amniotic sacs or the thin membrane divides them. Now they are already 10 months old and sometimes they look the same but there are times that they don't.

Do monochorionic diamniotic twins always look the same? I mean when it comes to physical aspect esp. their face, height, etc

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Suresh - posted on 03/28/2013

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Thanks for the useful information. my wife recently get pregnant, we met doctor she scan my wife and told, that my wife having monochorionic diamniotic twins. now we are fear about it, this conditions is normal? now my wife having 2 and half month old featus. please help us

Bindu - posted on 07/10/2014

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Hi,
I am 14 weeks pregnent with monochorionic/diamniotic twins.can anyone tel me the best high risk obgyn near fremont ca.i have one more doubt like can these types of twins can be a boy and girl.

Holly - posted on 01/05/2011

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If they were monochorionic diamniotic twins, they are definitely identical. Identical twins can look different because their genes may express differently depending on their environment (even if they're living in the same home).

Tasanee - posted on 06/06/2013

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My 5 year old MoDi twin boys look diff to me because I know them well but the only way I can tell who is who is when I look right at their faces. In photos they look like they're fraternals but in person and esp in the bathtub they are hard to tell apart. There are times when they are look diff and times when they are very identical. I think it's because they have different expressions. They do have different personalities for sure.

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Lora - posted on 05/20/2014

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Yea it's not possible to have mono di fraternal twins. That's what mono di are...identical they can either b mono di or mono mono. Fraternal always have seperate sacs however their placenta can fuse into one and theb they have a chance of having ttts. It is less common but does occur. Fraternal twins do not share the same dna. If they have a fused placenta they will hopefully share equally the nutrients. But only Identical can be mono mono or mono di

User - posted on 03/11/2014

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The terms identical and fraternal don't describe what the twins look like, but actually how they form. Identical (monozygotic) twins are always of the same gender because they form from a single zygote that contains either male (XY) or female (XX) sex chromosomes. Therefore, boy/girl twins are always fraternal or (dizygotic); they can only form from two separate eggs that are fertilized by two separate sperm. Fraternal twins can be either two girls, two boys, or one of each.

Brenda - posted on 11/23/2013

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To Johaurel-
Your post caught my attention because when I found out that I was pregnant with moDi twins,I was told by my ob, high risk ob, & other medical professionals, etc. that that they are definitely identical and that identical twins are always the same sex. I'm not saying that your twins are not identical, but am now curious if maybe I heard wrong/misunderstood(?)...has anyone been told this as well? It just interest me cuz your twin pregnancy was moDi, but had boy-girl twins. I just had twin girls, but they don't look identical to me...either that or maybe it's just a mother's instinct to be able to distinguish each baby? While pregnant, I was worried that I might get mixed up and not be able to tell them apart unless if one had a birth mark or if I kept their hospital bracelets on. Lol. Even though one is smaller than the other (I had to deliver them early cuz of the twin to twin transfusion risk-twin B was smaller & red due to being the recipient twin). Anyways, I guess I must've heard wrong & identical twins aren't always the same sex? Do identical twins also have the same blood type? Thanks & congrats & props to all! Being pregnant w/multiples is definitely way more tough than w/singleton!..& the list goes on! ;)

Ladyluvv - posted on 10/17/2013

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I deliver mo/di twins on may 13 2013. they were boy and girl. sometimes they look alike and sometimes they don't one is dark and one is bright one cries a lot one dosent bother he is laid back. they are total opposites. but the are identical because they shared the same placenta.

Jen - posted on 12/22/2012

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My sister and I are 30 year old "MoDi" twins. We look VERY different. Our entire lives we have been easy to tell apart. We look like singleton sisters. If ur interested in seeing how different twins can look, email me. JenRyder222@gmail.com

Wishing you and your twins the best!

Nacarid - posted on 06/20/2012

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Thank you for posting this. I found this very helpful. I often wonder how is it that they know that my twins are identical. After reading this, I understand a little better.

Stephanie - posted on 06/13/2012

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Yes,if you have mono/di twins they are identical.I am pregnant with identical twin girls myself and I met with fetal medicine expert dr to find out the type of twins I am having.The fetal medicine dr told me mono/di is only identical twins and that they can not be fraternal.

Hanna - posted on 05/06/2010

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One day my twins can look identical and the next they look completley different. The one that was bigger all the way through my pregnancy is still bigger now but I know they are identical as they shared the same placenta.

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