What would a 13 week potty shot look like? Anyone have any examples?

At 13 weeks, since all babies still have nubs, what would a potty shot look like? Would both boys and girls have a protrusion between the legs in a potty shot? Or would it be possible to identify a girl at 13 weeks based on a potty shot? Anyone have any examples of potty shots at this gestational age (boys or girls)?

Thanks in advance! :)

By 13 weeks babies have started to develop at their own rate. I have seen girls with very clear protrusions at this point and I have seen some with clear as day 3 lines. It really varies.