9Davis A, Lippman J, Godwin A, et al. Triphasic norgestimate/ ethiny estradiol oral contraceptive for the treatment of dysfunctional uterine bleeding. Obstet Gynecol, 2000, 95:s84.
10Tang QS, Xu JS, et al. The effect of contraceptive pills on the measured blood loss in medical termination of pregnancy by mifepristone and misoprostol. Hum Reprod, 2002, 17 (1): 99-102.