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barnes - November 27th, 2006 3:17 PM

Hi -
I have a single, day-7 frozen embryo. What are the chances of success? I'm kind of feeling like "why bother" because I transferred 2 AA day-6 blasts in a fresh cycle and 1 day-6 and 2 day-7 frozen embryos (85-95% alive), all from the same cycle.
Thanks.

Dr Smith - November 28th, 2006 10:20 AM

I'd say your chances are not great, but still possible. I don't have any personal experience with Day 7 frozen-thawed transfers, but here is a reference to case report.

Dizygotic twin delivery following in vitro fertilization and transfer of thawed blastocysts cryopreserved at day 6 and 7.
Sills ES, et al Fertil Steril. 2003 Feb;79(2):424-7.

One of the twins came from a Day 6 embryo, the other from a Day 7 so it can happen.

Not sure why they didn't go for broke and thaw the remaining Day 7 blastocyst when they thawed everything else. I guess they had their reasons.


barnes - November 28th, 2006 11:55 AM

Thanks - you confirmed what I suspected. I think they didn't thaw the 4th b/c I have a history of pregnant with multiples. Not that any of them worked out.


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