Researchers are discovering that breastfeeding is more protective of maternal health than previously imagined and that it dramatically lowers women's risk of cardiovascular disease, metabolic syndrome, and diabetes during middle and old age--common causes of premature mortality. Previously, the health benefits of breastfeeding were mainly focused on the infant. New data suggests that breastfeeding may have life-long effects for both mother and baby. Psychoneuroimmunology is an emerging, interdisciplinary science that considers the ways in which the human mind and the immune system interact...