Adolescent Pregnancy Behavior Biology Birth Weight Body Weight Bonding Breast Feeding Child Development Child Health Critique Delivery Delivery Of Health Care Demographic Factors Developing Countries Diseases Economic Factors Educational Status--women Family Planning Fertility Growth Health Health Services Immunization Infant Mortality Infant Nutrition Infections--prevention and control International Agencies Interpersonal Relations Low Birth Weight Maternal Health Maternal Mortality Mortality Neonatal Mortality Nutrition Organizations Physiology Population Population Dynamics Pregnancy Pregnancy Outcomes Primary Health Care Reproduction Reproductive Behavior Socioeconomic Factors Socioeconomic Status Un Weaning Who