I did 8 cycles altogether, beginning July 2004. Of these, 5 were stim cycles and 3 were natural FETs. I have no problems with my P4 levels, so my doctor never believed that I needed a medicated FET.
Of my 5 stim cycles, one was cancelled due to poor response, but in all other cases, I averaged between 7 - 10 eggs. Our fertilisation rate was good, between 5-7 fertilising each time. Except for the 1st cycle where we only transferred 1 day 2 embryo, we always transfer 2 embryos at day two, bar the 7th cycle where we transferred 2 day three embies that had had assisted hatching done. None of these worked.
For the last (8th) cycle, we decided on blast transfer. We collected 10 eggs, of which 6 fertilised, and we ended up with 3 blasts. Of these three blasts, 1 was a Grade 1, two had started out withonly 1 pronuclei and, while considered abnormal, were still cultivated and ended up being Grade 1s as well. Their chance of success was limited, but the embryologist suggested we use them anyway.
We had the normal grade 1 and an abnormal grade 1 transferred, and I am now 11 weeks pg with a singleton.
Do I think blasts are better? I cannot definitively say that that's what worked, or if our number just came up, but it seems like an awfully big coincidence to me.
As for your P4 support, have you asked for the levels from your previous cycles? Armed with these numbers, you'll be able to get your doctor to explain how Pregnyl would be beneficial as compared to Crinone (yuk btw) or pessaries.
Either way, good luck with your upcoming cycle! There are some girls in here who've run the gamut of medications, tests and protocols, and hopefully they'll have some answers for you too.
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