So... What do you think?

So as I was showing my ultrasound to coworkers (healthcare) one chimes in and says you're having a girl! I asked why she thought that and she said the labia to the vagina are visible in the picture! As I got to looking that is what it looks like! (2 lines in the circle) this was taken at 13 weeks I was wondering if anyone else sees or thinks the same thing? :) thank you! We find out in two days and are very very excited!!