Diamniotic twin pregnancies with a single placental mass; prediction of chorionicity at 11 to 14 weeks of gestation.
D000650:Amnion / Q000000981:diagnostic imaging; D002823:Chorion / Q000000981:diagnostic imaging; D005260:Female; D006801:Humans; D010920:Placenta / Q000033:anatomy & histology* / Q000000981:diagnostic imaging*; D049590:Postpartum Period; D011247:Pregnancy; D011248:Pregnancy Complications / Q000000981:diagnostic imaging / Q000517:prevention & control; D012307:Risk Factors; D014429:Twins, Dizygotic; D014430:Twins, Monozygotic; D016216:Ultrasonography, Prenatal; D014621:Vagina / Q000000981:diagnostic imaging