  I read somewhere (The urlLink Baby Names website, I think) that if you're aiming for a baby girl (Ha! No pun intended...), you gotta make whoopee 2 to 4 days before ovulation. Also, when making whoopee, there are certain positions that you gotta get into if you want to have a baby girl or boy -- since the little Ys are sprinters, you and the husband have to be as close as possible. You know what I mean. And since Xs are marathon runners (kinda slow but have more stamina and endurance than the Ys), you do the opposite thing (Don't get too close!). I have other theories which I've read about, but I don't know if they're true. Urhm. Let me validate them first. 
