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Polyzygotic Triplets

post #1 of 23
Thread Starter 
A good friend of mine has triplets - 2 boys and 1 girl. I just found out the 2 boys are identical (you'd think I would know but they wear their hair differently, 1 has glasses, etc.). I was wondering how common this was.
post #2 of 23
I've seen (online, on blogs) quite a lot of quadruplets that have an MZ twin set. I think it must be sort of common because many higher-order multiples are IVF, and they don't implant that many embryos for IVF anymore, so you're not going to get higher-order multiples unless one of the embryos splits, yk?
post #3 of 23
I've met several people with spontaneous triplets, and this is often how they occur: what started out as dizygotic twins becomes triplets when one of the zygots spits into identical twins.

Wild!
post #4 of 23
I read somewhere when I was pregnant that this is actually the most common combination for triplets, but I can't remember the source. IRL, all the triplets I know are either MZ or trizygotic, but I only know half a dozen sets.

Some forms of assisted reproduction increase the likelihood of splitting, so there are definitely many sets of triplets from two embryo IVF transfers.
post #5 of 23
The only higher order multiples have been that way. Odd, I know...but that is just how it has been.
post #6 of 23
I know three sets of triplets personally, and two of them are this way. Interestingly, they're both 2 MZ boys and 1 girl. The other set is trizygotic as a result of clomid.
post #7 of 23
There is a woman with quads in my DDC (on another forum) who 2 of the babies are identical (as they only implanted 3 embies!)
post #8 of 23
Yup it's very common. I know one set like this, mz girls and their bro is dz to them. Most of the trips I know are all TZ though, however I have also read that the mz/dz combo is the most common of all trip combos. They're a miracle no matter how they're classified!
post #9 of 23
This is exactly what happened to my cousin. They weren't TTC and boy did they get a big surprise. The boys are identical and they have a sister. Crazy!
post #10 of 23
I think it's pretty common. I have a friend with quads via IVF, but she only had three implanted, and one split.
post #11 of 23
Yes, I know several people who have a monozygotic pair within their triplets, after implanting 2 embryos for IVF.
post #12 of 23
We have friends with spontaneous triplets, and this is the case with them, too. A pair of DZ twins (b/g) and one of the zygotes split so there's a MZ pair.
post #13 of 23
my quadruplets have 1 set of monozygotic babies transferred 3 but have 4 babies on the way!
post #14 of 23
wow congrats!!X4
post #15 of 23
Quote:
Originally Posted by kristinc View Post
my quadruplets have 1 set of monozygotic babies transferred 3 but have 4 babies on the way!

CONGRATS ::::

hope we'll see you around this forum sometimes mama
post #16 of 23
Congrats Kristinc
post #17 of 23
Quote:
Originally Posted by kristinc View Post
my quadruplets have 1 set of monozygotic babies transferred 3 but have 4 babies on the way!
Wowza! : HUGE congratulations! I'd invite you to join the ivf thread as a grad, but....the idea of quads might scare us. Congrats!
post #18 of 23
So at how many weeks did the embryo's split?
post #19 of 23
Quote:
Originally Posted by Gena 22 View Post
I've met several people with spontaneous triplets, and this is often how they occur: what started out as dizygotic twins becomes triplets when one of the zygots spits into identical twins.

Wild!
Yep, this is my situation right now! I am almost 25 weeks with spontaneous triplets who were conceived this way : And yeah, it is wild
post #20 of 23
I used to come here quite a bit and then i got a bad taste in my mouth for awhile so i stayed away, but staring down the barrel of bed rest i may try mdc out again:-)

Lol....and yes i am pretty sure i would scare you all in the ivf forum:
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