title: [The earliest detection of fetal heart activity by ultrasound].
mesh_terms: D000328:Adult; D005260:Female; D005333:Fetus / Q000502:physiology*; D006321:Heart / Q000502:physiology; D006801:Humans; D011247:Pregnancy; D013997:Time Factors; D014465:Ultrasonics
vernacular_title: Der früheste Nachweis der fetalen Herzaktion durch Ultraschall.