Dual marker test is absolutely necessary to rule out mental retardation Placenta is low lying .. avoid pelvic jerk Placenta shud migrate up by 22 to 24 weeks

Dual marker should be done before 13 weeks + 6 days + and cannot be committed as of now because after 5th month the placental location can literally be away from the US especially 2.5 CM

Placenta is low lying, just avoid intercourse.repeat scan @ 5 th month

Generally at 3-4 month placenta is in slight low down in its position with the advance week it will go up by itself....so don't take tension of placenta for that repeat scan after 1 half month.....if NT/NB scan is normal then don't take much tension....but it is better go for dual marker as it will tell u about if any syndrome is there or not....

Dual marker test is done with NT SCAN

Follow your doctor. It's not ok.

If nt nb are normal dual markers not done no need now provided if you don't have any previous pregnancy problems

Dual marker is done from 11 to 13+6 weeks . Placenta is low lying but wil migrate eventually