Many thanks for your thoughtful answers on this forum. I've learned so much just from reading old posts. Infertility is such a difficult journey, and resources like this are incredibly helpful.
I'm 31 and have PCOS. IVF#2 resulted in a twin pregnancy, which I lost at 17 weeks due to incompetent cervix.
I have 6 frozen day 5 blastocysts from that cycle:
- 1 completely hatched blast, grade 1
- 1 hatching blast, grade 1/2
- 4 hatching blasts, grade 2
Also, when I had my fresh transfer on day 4, I had one grade 1 embryo and one grade 2 embryo (which were transfered). All the other embryos were poorer quality (not sure of specific grades) on day 4. Does that have any bearing on the quality of these frozen blasts? Or, now that they made it to blast, their status on day 4 is irrelevant?
Given my poor outcome with twins, I do not want to have another twin pregnancy. However, I know that success rates with FET are lower in general, and I worry about lowering my chances even further by doing a single embryo transfer.
Given my embryo grades, what do you think are my chances of success with a single embryo transfer? what would be success rates with 2? What are chances of twins if I decide to transfer 2?