I honestly don't know! If they're reasonable quality 5 dayers And able to be frozen, then I think one. I don't know if I am able to hold a pregnancy as I have never actually been pregnant. Assuming I can, I'd be scared of tempting fate and ending up with a higher order multiple pregnancy! I've already been having vivid dreams of identical twin girls! Identicals, so one embryo splitting. Imagine if that happened with two!
On the other hand, if they aren't great quality,and can't be frozen, then we may consider two... possibly.