Gerais A S, Rushwan H
Int J Gynaecol Obstet. 1985 Jun;23(3):229-33. doi: 10.1016/0020-7292(85)90110-9.
A crossover study from a standard-dose to a low-dose oral contraceptive was conducted in the Sudan. Reported side effects were very few, with a headache the most frequently reported. Switching to the other pill did not affect the rate of any side effects.
在苏丹进行了一项从标准剂量口服避孕药转换为低剂量口服避孕药的交叉研究。报告的副作用非常少，其中头痛是最常报告的。改用另一种药丸对任何副作用的发生率都没有影响。
