[Natural childbirth in the ecology of reproduction].
D005260:Female; D006266:Health Education / Q000639:trends*; D006801:Humans; D008297:Male; D009321:Natural Childbirth / Q000523:psychology / Q000639:trends*; D010287:Parent-Child Relations; D011247:Pregnancy; D011295:Prenatal Care / Q000639:trends*
Poród naturalny w ekologii rozrodu.