title: [Ultrasound studies in gynecology and obstetrics: the fetal heart can be monitored early in pregnancy].
mesh_terms: D005260:Female; D005318:Fetal Heart; D006801:Humans; D008991:Monitoring, Physiologic; D010922:Placenta Diseases / Q000175:diagnosis; D011247:Pregnancy; D011272:Pregnancy, Multiple; D014463:Ultrasonography
vernacular_title: Ultralydundersøgelser i gynaekologi og obstetrik: tidligt i graviditeten kan et fosters hjerteaktion bedømmes