Gender! Boy or Girl!??

Mia🌹 β€’ inlove with my baby boy Elijah 3.10.16 πŸ˜‡πŸ’•πŸŒΈπŸ™. First time Mommy tπŸ’“πŸ˜„

I had an appointment on Thursday. Dr tried to see what I was having and he wasn't sure. He said it might be a boy.

I was 17wks that day.

When they say might how much are they are right? Could it still be a girl? Even tho he said it might be a boy? Had this happen to anyone of you ladies? And it turn out your having the opposite sex??!