16 week and 20 week ultrasounds say different sexes?!

Janie
Just had my 4th month appt today and blood work and the Dr had made a comment about finding out the sex in just a few weeks. I told him that we actually found out at 16 weeks already and showed him our pics. He then proceeds to say "oh that's a horrible pic to base the sex off of".... 😐 needless to say, I am NOT amused by his comment, and the tech at 16 weeks determined it was a GIRL with 95% confidence. (She obviously saw more than just that one picture my Dr saw today to make that decision) Just wondering if anyone has had different sexes determined at 16 weeks vs. 20 weeks.