I dont know anyone who has been through IVF ( although I almost had to !) But it makes sense to me that there would be more boys as the little boy sperms are the quicker swimmers...so if you pop a lot of fresh girlie sperms and boy sperms next to an egg the boys win most the time. And I have heard the best way to get a girl is to Bed a few days before ovulation as the girls live longer then the boys so they have more chance!

Cass