m2c - i guess it depends on the clinic, but we've only ever been told to avoid sex in the couple of days before EPU, and for at least 24 hours post embryo transfer.

i would take it easy on the tennis front in any TWW - high body temps aren't good for small embryo's - heat packs etc are a no go after ET, so i'd think if you get very hot while playing tennis, it's not the smartest move... speak to your FS about it though - they might say it's ok - i guess i just look at the amount of time, money and emotion invested in getting through IVF, and i'm not keen to do anything to risk it...

hope that helps

BG