[Various problems in obstetrical definitions. Definition of viable birth and its future problems].
D000029:Abortion, Legal; D000032:Abortion, Therapeutic; D000328:Adult; D001724:Birth Weight; D005260:Female; D005313:Fetal Death; D005333:Fetus; D005865:Gestational Age; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D008297:Male; D011247:Pregnancy; D009626:Terminology as Topic