title: [Results of phase analysis of fetal heart activity in 690 normal pregnancies].
mesh_terms: D005260:Female; D005318:Fetal Heart / Q000502:physiology*; D006326:Heart Auscultation; D006801:Humans; D011247:Pregnancy
vernacular_title: Rezultati ot fazoviia analiz na surdechnata deĭnost na ploda pri 690 normalni bremennosti.