[Early detection of fetal heart sounds in the 1st pregnancy trimester].
D000030:Abortion, Missed / Q000175:diagnosis; D000033:Abortion, Threatened / Q000175:diagnosis; D006063:Chorionic Gonadotropin / Q000652:urine; D003937:Diagnosis, Differential; D005260:Female; D005318:Fetal Heart; D005865:Gestational Age; D006326:Heart Auscultation; D006801:Humans; D001523:Mental Disorders / Q000175:diagnosis; D011247:Pregnancy; D011258:Pregnancy Tests; D014465:Ultrasonics / Q000295:instrumentation; D014463:Ultrasonography
D006063:Chorionic Gonadotropin
Frühnachweis fetaler Herztöne im ersten Schwangerschaftsdrittel.