I'm getting one in two weeks at 34 weeks because I'm measuring super big so the doctor ordered a growth ultrasound. I think it ultimately depends on your pregnancy. But we have gotten outside ultrasounds too for the 3d/4d and peace of mind in the early weeks due to a prior miscarriage.

I get one every 2 weeks. but that's because I'm high risk. .my first I only had 2.

I get 3. one at the beginning, the anatomy one and then I'll get one on the 19th at 36 weeks :) I wish I could've gotten more though :(

With my previous pregnancies I only had two. With this I'm high risk and had a third at 32 weeks. Every situation and office is different, like @cubanese said just call and ask

I'm high risk so I get one every month. You will most likely have one more before baby is born

I'll get my next one at 30 weeks and again at 37 I just looked at my calender