Breast feeding: fertility regulation and its social importance.
D001942:Breast Feeding; D005260:Female; D005298:Fertility; D006293:Health Promotion; D006801:Humans; D007223:Infant; D007227:Infant Nutritional Physiological Phenomena; D007231:Infant, Newborn; D008880:Midwifery; D009773:Obstetric Nursing; D011247:Pregnancy