We found out with all 3 of ours. I am a bit of a control freak and love being organised. I also know that once I had a little boy or girl, I wouldn't dress them in any nuetral clothes that I might have bought before they were born so I was better off just finding out and buying gender specific stuff. I also got to be the one to tell everyone in person whether we were having a boy or girl - I feel like I would have missed out a bit if DH had done it over the phone after the baby was born.