Pinkerton G D, Carey H M
Med J Aust. 1976 Feb 21;1(8):220-2.
Basal temperature records were maintained by 346 women after ceasing to take oral contraceptives; 167 had ceased using combined and 179 had ceased using low-dose sequential formulations. In the first cycle after withdrawal of low-dose sequential pills, 11 (6%) women failed to ovulate and ovulation was delayed in five cases. Short luteal cycles occurred in 14 subjects. In 83% of the subjects there was no disturbance of ovulation. In the first cycle after withdrawal of combined oral contraceptives, 49 (30%) women failed to ovulate and ovulation was delayed in 29 cases. A short luteal phase was observed in 26 subjects. In only 38% of the subjects was there no disturbance of ovulation. The minimal disturbance to ovulation in the cycle after the withdrawal of low-dose sequential formulation indicates that this type of oral contraceptive carries little risk of producing post-pill infertility. Women under the age of 21 years were anovulatory nearly twice as frequently as older women after ceasing to use combined oral contraceptives.
346名女性在停止服用口服避孕药后记录了基础体温；其中167名停止使用复方制剂，179名停止使用低剂量序贯制剂。在停用低剂量序贯避孕药后的第一个周期，11名（6%）女性未排卵，5例排卵延迟。14名受试者出现黄体期短的情况。83%的受试者排卵无紊乱。在停用复方口服避孕药后的第一个周期，49名（30%）女性未排卵，29例排卵延迟。26名受试者观察到黄体期短。只有38%的受试者排卵无紊乱。停用低剂量序贯制剂后周期中对排卵的干扰最小，表明这种类型的口服避孕药导致停药后不孕的风险很小。21岁以下的女性在停止使用复方口服避孕药后无排卵的频率几乎是年长女性的两倍。
