At 14 weeks I was told incorrectly (however I feel this was on purpose as the woman was sooo rude) At 16 weeks I went elsewhere, paid more, better service and I was told i was having a girl. (Which I had) 16 weeks is more recommended, but if they advertise 15 weeks I’m sure they’ll get it right!
The place I booked says if they can’t find the gender on this scan they re scan you at a later date for free so I don’t mind if they don’t find it first time I just wanted to see what other peoples experiences were with earlier gender scans ☺️
I was 14 weeks when I found out gender and it was correct too