I'm not a huge fan. But an 18 week u/s in my last pg caught my baby's cleft lip and palate which I am quite grateful for. I'm so glad we were prepared and that my midwife was prepared and not shocked when he was born She knew to make sure his airways were clear right away and I knew to be prepared to pump. Huge blessing!
This time we were planning on just doing the 2nd tri u/s but there is kind of a huge discrepancy in my dates and where I'm measuring so we'll do one tomorrow morning. Doesn't have to be done but it will give me peace of mind. I totally support doing a u/s-free pregnancy. I don't think it's necessary most of the time.
I think every mama just has to do what will give her peace whether it's no ultrasounds or more than a few. Mom's stress is probably worse on baby than a u/s is.