Low-lying placenta is when the edge of placenta is __________: (A) <2cm away from the internal os, (B) >2.5 cm away from the internal os, (C) >2 cm away from the internal os, (D) <2.5 cm away from the internal os
Answer is A. When the placental edge is <2cm from, but not over, the internal os, the placenta is defined as low-lying placenta. The diagnosis of low-lying placenta is made by the ultra sound examination. Ref: Williams Obstetrics 25th edition Pgno: 774