N2L - My FS told me that this is true, having had successful pgs makes it easier for your body to get pg again. The process of conceiving and being pg primes your body for it, and makes it easier next time. This gave me a lot of hope that I may be able to have my dreamed-of number three baby. Obviously it's not true for everyone, or there would not be secondary infertility, but it was what I wanted to hear!