What should we expect at our 20 week ultrasound?

What should we expect at our 20 week ultrasound?
Question by do it for jesus: What should we expect at our 20 week ultrasound?
Hello ladies! My husband and I are going next Thursday to have our big 20 week ultrasound, and to hopefully find out whether we are having a boy or a girl! I have heard mixed things about what to expect at that ultrasound, and what they look for, so I was just wondering what your experiences were with it? What happens if the baby doesn't cooperate and we can't

3d ultrasound pictures