Ultrasound estimation of amniotic fluid volume using the largest vertical pocket containing umbilical cord: measure to or through the cord?
Magann EF, Chauhan SP, Washington W, Whitworth NS, Martin JN, Morrison JC. Ultrasound estimation of amniotic fluid volume using the largest vertical pocket containing umbilical cord: measure to or through the cord? Ultrasound Obstet Gynecol. 2002 Nov; 20(5):464-7.