Capabilities of gray-scale imaging in obstetrics and gynecology.
D003626:Data Display; D005260:Female; D005333:Fetus / Q000033:anatomy & histology; D006801:Humans; D010920:Placenta / Q000033:anatomy & histology; D010923:Placenta Previa / Q000473:pathology; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D012732:Sex Determination Analysis; D014465:Ultrasonics / Q000295:instrumentation; D014463:Ultrasonography