[Ultrasonics and fetal electrocardiography].
D000328:Adult; D000367:Age Factors; D004562:Electrocardiography; D005260:Female; D005318:Fetal Heart; D005865:Gestational Age; D006801:Humans; D008722:Methods; D010298:Parity; D011247:Pregnancy; D014465:Ultrasonics
Ultrasonido y electrocardiografía fetal.