They told my best friend at 12 weeks she was clearly having a baby boy, her first boy out of 6. Guess what?? 2 days ago she had a ANOTHER GIRL!! I would wait to find out or wait to make 100% sure the baby is what the doctor thinks.
I had my 12 weeks ultrasound today and they said they go by a "nub theory" and she said its 90% a boy. She has been there 5 years and only been wrong 5 times.
I will have to see how accurate that is in a couple months when its parts are a more distinct