Identical vs. Fraternal Twins

xSTACEx · Mar 25th, 2011, 08:38 AM

Ok ladies. I hope you can help me out because I'm feeling total shock and amazement right now. I'll admit, I feel a bit overwhelmed, too.

I had an IUI with one good follie. Today, I went for my first ultrasound and found out there are 2 beans in there! They have their own sacs and are a good amount apart from each other in the uterus.

My question is - What is the chance these will be identical twins vs fraternal? I'm extra curious because I only triggered with one egg, but like I said, they aren't sharing a sac.

I'm going to try and process this whole twins concept and how I'll find a way to put 2 of everything in 1 bedroom while I wait to hear your replies. haha Thanks, darlings!

Plus2 · Mar 25th, 2011, 08:58 AM

I don't actually have any useful advice, just wanted congratulate you!!
Keep us updated on how you get on.
xx

ni2ki · Mar 25th, 2011, 09:05 AM

They dont have to be in one sac to be identical, if the gap between them is large though im guessing fraternal, identicals only have a thin membrane seperating them. Congrats

xSTACEx · Mar 25th, 2011, 09:06 AM

Quote:

Originally Posted by ni2ki

They dont have to be in one sac to be identical, if the gap between them is large though im guessing fraternal, identicals only have a thin membrane seperating them. Congrats

Thank you and I'm sorry if I sound naive, I'm just not knowledgable on the topic and wasn't expecting twins!

chan8180 · Mar 25th, 2011, 15:40 PM

sound like fraternal?? congratulations by the way, how exciting!!

ni2ki · Mar 25th, 2011, 17:38 PM

Hehe youre not naive at all! Ours are a shock too, but twins are a blessing identical or not, its not something everyone is blessed with :-) get scan pics up, all the ladies on here love piccies! Xx

Ambersachef · Mar 25th, 2011, 20:21 PM

There is a thin line between my twins. My OB said that if they split really early like within the first few days of fertilization then they can be in their own sacks with their own placenta etc. My doctor said at this point i have a 50/50 chance of them being identical or fraternal.. I guess i have to wait until the ultrasound to determine gender... if its a boy and girl then they are definately fraternal.. also if when they are born they have two different blood types they are fraternal. Other than that if when they are born they look alike, same gender etc, then the only way to determine is by genetic testing.

Anna1982 · Mar 26th, 2011, 01:22 AM

Quote:

Originally Posted by Ambersachef

There is a thin line between my twins. My OB said that if they split really early like within the first few days of fertilization then they can be in their own sacks with their own placenta etc. My doctor said at this point i have a 50/50 chance of them being identical or fraternal.. I guess i have to wait until the ultrasound to determine gender... if its a boy and girl then they are definately fraternal.. also if when they are born they have two different blood types they are fraternal. Other than that if when they are born they look alike, same gender etc, then the only way to determine is by genetic testing.

my sonographer told me the same thing and mine are both girls so its a waiting game lol

congrats on having twins!

mine are in seperate sacs but with only a thin membrane between them, theresd no gap between the sacs

BeckyD · Mar 26th, 2011, 02:57 AM

It all depends on whether they were one egg that split very early on.
If it was in the first few days, they could be in separate placentas and sacs.
From wikipedia....
"In the uterus, a majority of identical twins (60–70%) share the same placenta but have separate amniotic sacs. In 18–30% of identical twins each fetus has a separate placenta and a separate amniotic sac. A small number (1–2%) of identical twins share the same placenta and amniotic sac. Fraternal twins each have their own placenta and own amniotic sac."

From a hospital point of view, they are only concerned at this stage about how to treat the pregnancy and this does vary dependent on whether they share a placenta, chorion and amnion.

bek74 · Mar 26th, 2011, 05:57 AM

I will say Fraternal...

Mar 25th, 2011, 08:38 AM	1
xSTACEx Pregnant (Expecting) Active BnB Member Join Date: Feb 2010 Location: Philadelphia, PA Posts: 395	Identical vs. Fraternal Twins Ok ladies. I hope you can help me out because I'm feeling total shock and amazement right now. I'll admit, I feel a bit overwhelmed, too. I had an IUI with one good follie. Today, I went for my first ultrasound and found out there are 2 beans in there! They have their own sacs and are a good amount apart from each other in the uterus. My question is - What is the chance these will be identical twins vs fraternal? I'm extra curious because I only triggered with one egg, but like I said, they aren't sharing a sac. I'm going to try and process this whole twins concept and how I'll find a way to put 2 of everything in 1 bedroom while I wait to hear your replies. haha Thanks, darlings!

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Mar 26th, 2011, 05:57 AM	10
bek74 Mum (Mom) BnB Addict Join Date: Jul 2007 Location: Brisbane Queensland Australia Posts: 3,672	I will say Fraternal...

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Mar 25th, 2011, 08:58 AM	2
Plus2 AutoSignup (SAAB) Active BnB Member Join Date: Nov 2008 Posts: 702	I don't actually have any useful advice, just wanted congratulate you!! Keep us updated on how you get on. xx

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Mar 25th, 2011, 09:05 AM	3
ni2ki Mum (Mom) Active BnB Member Join Date: Dec 2010 Location: March Posts: 455	They dont have to be in one sac to be identical, if the gap between them is large though im guessing fraternal, identicals only have a thin membrane seperating them. Congrats

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Mar 25th, 2011, 15:40 PM	5
chan8180 Pregnant (Expecting) Active BnB Member Join Date: Sep 2010 Posts: 270	sound like fraternal?? congratulations by the way, how exciting!!

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Mar 25th, 2011, 17:38 PM	6
ni2ki Mum (Mom) Active BnB Member Join Date: Dec 2010 Location: March Posts: 455	Hehe youre not naive at all! Ours are a shock too, but twins are a blessing identical or not, its not something everyone is blessed with :-) get scan pics up, all the ladies on here love piccies! Xx

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Mar 25th, 2011, 20:21 PM	7
Ambersachef Pregnant (Expecting) Active BnB Member Join Date: Feb 2011 Location: Louisiana Posts: 51	There is a thin line between my twins. My OB said that if they split really early like within the first few days of fertilization then they can be in their own sacks with their own placenta etc. My doctor said at this point i have a 50/50 chance of them being identical or fraternal.. I guess i have to wait until the ultrasound to determine gender... if its a boy and girl then they are definately fraternal.. also if when they are born they have two different blood types they are fraternal. Other than that if when they are born they look alike, same gender etc, then the only way to determine is by genetic testing.

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Mar 26th, 2011, 02:57 AM	9
BeckyD Mum (Mom) Active BnB Member Join Date: Oct 2010 Location: Solihull, West Midlands, England. Posts: 462	It all depends on whether they were one egg that split very early on. If it was in the first few days, they could be in separate placentas and sacs. From wikipedia.... "In the uterus, a majority of identical twins (60–70%) share the same placenta but have separate amniotic sacs. In 18–30% of identical twins each fetus has a separate placenta and a separate amniotic sac. A small number (1–2%) of identical twins share the same placenta and amniotic sac. Fraternal twins each have their own placenta and own amniotic sac." From a hospital point of view, they are only concerned at this stage about how to treat the pregnancy and this does vary dependent on whether they share a placenta, chorion and amnion.

Status: Offline

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