Effect of oral contraceptives on weight and body composition in young female runners.
Procter-Gray E, Cobb KL, Crawford SL, Bachrach LK, Chirra A, Sowers M, Greendale GA, Nieves JW, Kent K, Kelsey JL. Effect of oral contraceptives on weight and body composition in young female runners. Med Sci Sports Exerc. 2008 Jul; 40(7):1205-12.