Ram KT, Bobby P, Hailpern SM, et al. Duration of lactation is associated with lower prevalence of the metabolic syndrome in midlife - SWAN, the study of women's health across the nation. Am J Obstet Gynecol 198: 268. e1-e6, 2008
Stuebe AM, Michels KB, Willett WC, et al. Duration of lactation and incidence of myocardial infarction in middle to late adulthood. Am J Obstet Gynecol 200: 138.e1-e8, 2009