Placental localisation in early pregnancy.
Stephens
J D
JD
D005260:Female; D006801:Humans; D010920:Placenta / Q000000981:diagnostic imaging*; D010923:Placenta Previa / Q000000981:diagnostic imaging*; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D011296:Prenatal Diagnosis / Q000379:methods*; D014463:Ultrasonography