Quoting ♡ kat&noah (28wks):" Yeah and I need to follow up with my OB (who I'm probably gonna change because he failed to mention anything like this to me!) I thought I was fine, and he just neglected to mention anything. "
From experience...most doctors don't think about checking unless you've been having issues. I do believe that it has to be checked by ultrasound. During my last pregnancy, mine was fine at my 20 week appointment during the anatomy scan, but at 26/27 weeks, it was short. I wouldn't have known if I didn't start having early contractions and pressure.