Hi Babymama
Welcome to our thread . I'm sure you will be pregnant in no time, these threads have a way of being last in first out!! When is your transfer? I can't really give you any numbers on how many will be affected by hubby's condition unfortunately that depends on how prevalent it is. If you google the condition and pgd you may find some more info. 20 is a great number to be working with though. At your age I don't think the drop of embryos should be too bad as your eggs are pretty fresh. I'm not sure if there are exact stats on drop off rates, I have never seen any, there are so many factors that can affect it. Sorry not much help am I
Good luck.