My doctor only told me I was goin' to have one (20w Anatomy Scan) and that's It, unless your a high risk or they find a complication. So I actually had two since I have Marginal Cord Insertion and even though I still have It, I'm not gettin' any more. It s*cks.
My dr told me I'd have one at 34 weeks n when I went in she said they weren't doing another one. I was furious. With my last 3 I always had another anatomy scan to check fluid. Size. Direction of baby etc. but not this time. Nd thing being is I've already had some issues so I figured they'd be extra cautious nd do another one. But this dr is different than my others n I'm not really fond of him hence why I've seen his nurse practitioners. I've actually spoken to my dr once. At 20 weeks after ultrasound.
With my son i only had 1 done that was at 20 weeks that was all. But i had 3 with this pregnancy so i dont know i guess it depends.
Mines did at 12wks and 15wks and 21wks and i should get another around 34 or 35wks.
A lot of times this is insurance-related. Some health insurance pays for more ultrasounds than others does.
Mine doesnt do one unless there is a problem or if they think baby is bigger than normal...19-20 weeks was the last one just to make sure everything was ok and get the gender.