title: [Determination of gestational age in early pregnancy using ultrasonics].
mesh_terms: D002508:Cephalometry; D005260:Female; D005333:Fetus / Q000502:physiology; D005865:Gestational Age; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D013997:Time Factors; D014465:Ultrasonics; D014599:Uterus / Q000502:physiology
vernacular_title: Bestimmung des Gestationsalters in der Fr5AUHSCHWANGERSCHAFT DURCH Ultraschall