Routine ultrasound scanning in midpregnancy.
D000649:Amniocentesis; D005260:Female; D005865:Gestational Age; D006801:Humans; D007752:Obstetric Labor, Premature; D011247:Pregnancy; D011248:Pregnancy Complications / Q000175:diagnosis*; D011262:Pregnancy Trimester, Second; D011254:Pregnancy in Diabetics; D011272:Pregnancy, Multiple; D011273:Pregnancy, Prolonged; D014463:Ultrasonography