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Old Sep 15th, 2011, 15:11 PM   1
Alwilan
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Identical Twins - Seperate Placentas. How common?


So when I was originally scanned I was told it was unlikely that my twins were identical, because of seperate placentas/ and sacs. Yet they added the clause of unless they are different sexes there is no way to be sure without the blood test at birth. I am expecting girls, and with the 2nd one smaller at early scans always presumed they would be non identical. At 14 weeks I was told my placentas were joined at the edge.

So has this happened to many of you and did they turn out identical/non identical I just don't know if it is the doctors say its possible because there is a 0.5% chance or whether it is much higher?

Apologies for my ramble



 
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Old Sep 15th, 2011, 16:07 PM   2
knitbit
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I'm in the same boat. I'm expecting two girls. As best as I can tell, the odds are 2/3 that they are fraternal and 1/3 that they are identical. I was told that when the embryo splits before the fourth day, they'll get separate placentas. Mine are measuring almost the same and they move similarly which really makes me wonder...



 
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Old Sep 15th, 2011, 16:10 PM   3
Alwilan
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It certainly gets your mind wondering, I don't mind either way, but just wish you could know beforehand. Thanks for the info though x



 
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Old Sep 15th, 2011, 16:50 PM   4
wondertwins
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Wow, this is news to me. I assumed that since my critters are in separate sacs and have totally separate placentas they are definitely fraternal. But I guess that's not always true. According to Wikipedia....

100% of all fraternal twins are DiDi (having separate sacs and placentas). Duh.
25% of all identical twins are DiDi.

And rounding out the stats:
60%-70% of all identical twins are MoDi (separate sacs, but shared placenta).
2% of all identical twins are MoMo (same sac and placenta)



 
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Old Sep 16th, 2011, 04:48 AM   5
Eternal
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do they test all at birth? Ive been told my are non-identical and that seems most likely to me, both have measured differently, clearly in different sacs and one placenta is anterior and other posterior, so think it would be impossible for mine to be indentical.

But two people with twins have told me you dont really know until birth. So do they check or not? Or only check if they have a doubt?



 
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Old Sep 16th, 2011, 08:44 AM   6
auntcarrie
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My OB told me there was a 1% chance they were identical since they were both girls. Who knows where he got his statistics if you all found the above.

Was very obvious right away they weren't. All my girls look very very different.



 
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Old Sep 16th, 2011, 08:50 AM   7
Mosnippy
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hiya ..i dont have twins but am an Auntie to twin monkeys!

they where fraternal..two sacs etc and were told they not identical..but its hard to tell them apart! i posted a pic for you! there is slight differances..but my brother still gets them confused!! Men for you!!



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Old Sep 16th, 2011, 09:28 AM   8
wondertwins
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Quote:
Originally Posted by Mosnippy View Post
hiya ..i dont have twins but am an Auntie to twin monkeys!

they where fraternal..two sacs etc and were told they not identical..but its hard to tell them apart! i posted a pic for you! there is slight differances..but my brother still gets them confused!! Men for you!!
Wow. They are really do look similar!



 
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Old Sep 16th, 2011, 09:31 AM   9
Mosnippy
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the worst bit they look like my brother...poor boys haha.. ok not the best photo..as little Caiden (with the bowl) is pulling a face!



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Old Sep 16th, 2011, 09:32 AM   10
Mosnippy
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thats a better one...



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