I'm on my fourth pregnancy have found out with all of them the sexes and all so far have been right, I'm sure sonographer got this baby right too but something in back of my mind keeps thinking but what if? I'm unsure this time but wondering if it's because I felt throughout this pregnancy it was a boy and then at 20 weeks exactly had my scan and she said girl. She showed us the three lines and we have two girls already and one boy. We found out with all of them and all previous sonographer a have been correct. So I don't know why I'm doubting it this time?