I had to have one scan to book my homebirth (to check for placenta praevia which cannot be dealt with at home). It would have been at 13 weeks but i was going to be on holiday then so i had it done at 11weeks. I declined N/T measurement.

It does not diagnose and it does not treat, and i didn't want to have a "risk" factor when it's a pointless number. Very very high risk (say 1 in 10) is still telling you there a 90% chance everything is fine. I wouldn't risk miscarriage on those odds so there was no point.

TBH if they hadn't required a placental-siting for my homebirth i'd not have had a scan at all. I would not be able to terminate a pregnancy. Even if my baby was going to die in utero or at birth, i'd rather not know. If i am only going to get 18 or 24, or 40 weeks of pregnancy or 2 hours or 5 days or 3 weeks of life after birth with my child, then i'd rather enjoy them and not waste them on worry and dread. Life is precious, cruelly shortened life even more so. JMO. I don't believe it is up to me to choose for them if they should come to earth or not and i do not currently feel i am in a position to decide whether someone who i haven't even met has a life ahead of them that is worth living based purely on the most limited of medical possibilities for them. Again, JMO.

Bx