title: Determination of biparietal diameter by the ultrasonic B-scan technique.
mesh_terms: D005260:Female; D005333:Fetus; D005865:Gestational Age; D006801:Humans; D008722:Methods; D010294:Parietal Bone / Q000196:embryology*; D011247:Pregnancy; D011296:Prenatal Diagnosis; D014463:Ultrasonography