Santoro N, Crawford SL, El Khoudary SR, Allshouse AA, Burnett-Bowie SA, Finkelstein J, Derby C, Matthews K, Kravitz HM, Harlow SD, Greendale GA, Gold EB, Kazlauskaite R, McConnell D, Neal-Perry G, Pavlovic J, Randolph J, Weiss G, Chen HY, Lasley B. Menstrual Cycle Hormone Changes in Women Traversing Menopause: Study of Women's Health Across the Nation. J Clin Endocrinol Metab. 2017 07 01; 102(7):2218-2229.