An examination of the relation between having been breastfed and the risk of adult cardiovascular events among 87,252 women born between 1921 and 1946 suggests a small reduction in risk of ischemic cardiovascular disease in adulthood among those who had been breastfed.

Rich-Edwards JW et al (2004). Breastfeeding During Infancy and the Risk of Cardiovascular Disease in Adulthood. Epidemiology 15: 550-556.