[Potentials of instrument observation of fetal cardiac activity during pregnancy and labor].
D004562:Electrocardiography / Q000379:methods; D005260:Female; D005318:Fetal Heart / Q000502:physiology*; D005323:Fetal Monitoring / Q000295:instrumentation*; D006801:Humans; D007743:Labor, Obstetric; D010701:Phonocardiography / Q000379:methods; D011247:Pregnancy; D014463:Ultrasonography
Vozmozhnosti apparatnogo nabliudeniia za serdechnoi.