The biggest contraceptive in the world.
D001942:Breast Feeding; D003267:Contraception; D003710:Demography; D003906:Developing Countries; D005193:Family Planning Services; D005298:Fertility; D006262:Health; D007227:Infant Nutritional Physiological Phenomena; D007774:Lactation; D009747:Nutritional Physiological Phenomena; D011153:Population; D011157:Population Dynamics; D012106:Research
Breast Feeding; Contraception; Demographic Factors; Developing Countries; Family Planning; Family Planning, Behavioral Methods; Fertility; Health; Infant Nutrition; Lactation, Prolonged; Nutrition; Population; Population Dynamics; Research Methodology