My OB does it at 28 weeks for everyone, maybe earlier if high risk. I'm having twins and they mentioned possibly doing it a little early.
If you considered high risk early on then they do it at around 27 weeks (unless you had it in an earlier pregnancy, in which case way earlier), they only tend to do it later if you are low risk but another reason comes about, such as baby measuring larger or more fluid than expected xx
I had mine at 13 weeks. I had gestational diabetes in my first pregnancy though so that’s probably why x
Mine is booked in for 25 weeks, but I'm considered higher risk due to my BMI x
I did mine around 26/27 weeks both pregnancies but now I’m doing additional testing as I’ve developed gestational diabetes later in pregnancy
Mines booked for 28 weeks, but that's because my BMI is slightly above the cut off. I never had to be tested in my first pregnancy
I had one at 22 weeks because baby is measured larger and if it's all fine they still want to check again at 28 weeks.
It can be done at any point. I had mine done at 36 weeks