Coutinho E M, Silva A R, Carreira C, Barbosa I
Contraception. 1984 Feb;29(2):197-202. doi: 10.1016/0010-7824(84)90030-1.
Plasma levels of estradiol and progesterone were investigated in women using daily vaginal pills containing 1 mg norethindrone and 50 mcg mestranol. Of 13 treatment cycles in ten women using one vaginal pill daily, six were ovulatory and seven anovulatory. All 12 cycles in ten women using two vaginal pills daily were anovulatory.
对使用含1毫克炔诺酮和50微克炔雌醇甲醚的每日阴道片的女性的血浆雌二醇和孕酮水平进行了研究。在10名每天使用一片阴道片的女性的13个治疗周期中，6个为排卵周期，7个为无排卵周期。10名每天使用两片阴道片的女性的所有12个周期均为无排卵周期。
