How many mommies?

How many mommies at 13 weeks and three days found out the sex of their baby via ultrasound we are hoping for a boy but not sure if at our next ultrasound theyll say if they see a peepee or not this is baby #2 and it was twins but i lost one of the twins due to vanishing twin syndrome. But just curious if any mommy's out there found out early especially with boys?