I just found this article (although I have no idea about the reliability of the study) which may interest others "over 40"

Fertility Neighborhood : Is There Still Hope After 40?

I'm definitely going to push my FS to transfer 3 (if I get 3 again) and am very sorry that I didn't push for 3 the first time when I had 3 high grade embryos...although I doubt she would have been willing to try my first cycle.

This article as well as the others I read is very clear that over 40's have a much lower risk of multiples as it is much harder to get pregnant generally!