INterestingly during a FET my previous FS was happy to transfer two (success rates lower in FET), but in fresh cycle only one.

My current FS is allowing us to transfer two and actually suggested it - although we are younger than usual, this is our sixth try and FS says he is more than happy to do 2 given our history.

If i have one or two - all that matters to me is the health of my bubbies (and naturally my own health as well). If you be realistic about the risks with multiple pregnancy and make your choice well informed, I think thats most important.