Gender Appointment

Donella
I have a full anatomy appointment on Tuesday 8/23 and I'll be turning 17 weeks on that exact day. I had a dream that the doctor told me I wasn't far along enough to tell whether my baby was a boy or girl. I hope my baby cooperates because my bf and I are hosting a gender reveal party for some close friends and family. How early did it take for some of you to find out the sex of your baby?