I think it'd be pretty close. It all depends on what sex the baby is and how he or she is laying at the time. I've heard that 12 weeks is really when the parts start to become noticeably different (because they both form from the same beginnings). That's still pretty early, but you never know. We found out were having a baby boy at 14 weeks 3 days. They were doubtful because it was "early" but baby cooperated and it was clear as day that it was a boy! I could even tell, which is saying something my cousin found out shes having a boy at 12 weeks 5 days. Not sure about the gender predictors... Good luck!View Thread