I just thought I'd share this info with you that I got from Serum. I can't believe how much time they are spending with me answering my questions when I'm not even a patient of theirs yet; they are amazing. I asked them about the effect of stimulation drugs on egg quality and they said:
'There was a study done a couple of years ago where they tried to compare groups of women with very similar characteristics, some of whom did minimal stimulation and some who did high stimulation. They checked the embryos for chromosomal problems using PGD, and the high stimulation group showed higher rates of aneuploidy (embryos with the wrong number of chromosomes) than the minimal stimulation group - but whether any of the errors found were triploidies, I'm sorry but I don't know.
We keep it in mind though, and we find with women who have a low response to stimulation, we see at least as good a pregnancy rate (often a better pregnancy rate) when we don't stimulate as when we use stimulation.
Another recent study didn't look at aneuploidies but just compared the pregnancy rates for older women with poor ovarian reserve using either a conventional (high dose) stimulation or a lower dose mixed protocol (clomid and FSH). The lower dose group had a significantly better pregnancy rate.
There is a lot that we don't know, but we do think that, particularly for some women, it is better to be cautious with the stimulation that we use and that the the stimulation protocol can have an affect on the egg quality and the implantation environment.'
This is interesting, as my NHS consultant told me that if I had treatment at the local private clinic they would use the maximum dose of FSH with me, and I'm wondering if that would be helpful after all.
Also, in case you're wondering about letrozole, she told me that would be considered mild stimulation, and therefore less of a risk to egg quality than high-dose stims.