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一般认为用口服避孕药(OC)妇女在停药后前3个月妊娠率较低,此后恢复正常。另有报告这种低的妊娠率可持续到停药后4～10个月。从口服避孕药后闭经病例说明,用OC 后妊娠延迟的可能原因是OC 中雌激素与孕酮联合作用于下丘脑,使GnRH、FSH 和LH 均被抑制而无排卵或排卵有缺陷。本文对New Haven 区1980.5.12～1982.3.12间各门诊部产前咨询的6219例妇女中5331(85.7%)例进行研究,排除不在该区分娩的83
Women with oral contraceptives (OC) are generally considered to have a lower pregnancy rate in the first 3 months after discontinuation, and return to normal thereafter. Another report of this low pregnancy rate can be sustained 4 to 10 months after withdrawal. Amenorrhea after oral contraceptives cases illustrate the possibility of delayed pregnancy after OC may be due to the combination of estrogen and progesterone OC in the hypothalamus, so GnRH, FSH and LH were inhibited without ovulation or ovulation defects. This study examined 5331 (85.7%) of 6219 women interviewed in various outpatient clinics in New Haven between December 12, 1982 and January 3, 1982, excluding 83