[Fetal age determination].
D004562:Electrocardiography; D005260:Female; D005318:Fetal Heart / Q000502:physiology; D005865:Gestational Age; D006801:Humans; D007231:Infant, Newborn; D010060:Ovulation; D011247:Pregnancy; D011258:Pregnancy Tests; D013997:Time Factors
Zur Reifegradbestimmung in der Schwangerschaft.