Letter: Normal ranges for biparietal diameter measurements.
D001208:Asia / Q000208:ethnology; D002508:Cephalometry; D004739:England; D005006:Ethnicity; D005260:Female; D005865:Gestational Age; D006801:Humans; D007231:Infant, Newborn; D010928:Placental Lactogen / Q000378:metabolism; D011247:Pregnancy
D010928:Placental Lactogen