Hi Where there's hope,

I was 36 yrs old when I got pregnant and 37 yrs old when I had the twins.
We only ever had the basic blood test even though it took 9 transfers for one to actual work. I never had any m/c's the eggs just didn't take in the other 8 transfers.
You mentioned OHSS in one of your post, I weight about 65kg and I was started on 250 units of Puregon then that was increased to 300 units on my second cyle and the most eggs we ever got was 12. I think it depends on your body and age. We always had the problem that out of those 12 eggs only about 3-4 were okay to use. We transfered 1 egg on 5 transfers and 2 eggs on 4 transfers. We also then had the problem that when our frozen ones were defrosted we lost about 70% of them in the process.
The hardest time I had with the whole IVF process is to accept that sometimes there are no answer to why things happen.