With my first kid, my wife wanted to wait but I didn't - well, you know who won that argument! I am really glad we waited, it was an awesome surprise and moment when our daughter arrived. (My wife was certain it was a boy). With #2 it was the opposite, I had so much fun finding out on the delivery day that I wanted to wait, but she had the "2nd kid, whatever" feeling...she also won that argument. So, we knew very early on that baby boy was on the way.