title: Placental localisation in early pregnancy.
mesh_terms: D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D010920:Placenta / Q000000981:diagnostic imaging*; D010923:Placenta Previa / Q000000981:diagnostic imaging*; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D011263:Pregnancy Trimester, Third; D014463:Ultrasonography