title: Breast-feeding, fertility, and family planning.
mesh_terms: D001942:Breast Feeding; D003267:Contraception; D003278:Contraceptives, Oral, Hormonal / Q000627:therapeutic use; D003906:Developing Countries; D005193:Family Planning Services; D005260:Female; D005298:Fertility; D006801:Humans; D007223:Infant; D007226:Infant Mortality; D007227:Infant Nutritional Physiological Phenomena; D007774:Lactation; D008895:Milk, Human / Q000032:analysis; D009747:Nutritional Physiological Phenomena; D011247:Pregnancy; D012959:Socioeconomic Factors
chemical_list: D003278:Contraceptives, Oral, Hormonal