Eslami S S, Gray R H, Apelo R, Ramos R
National Center for Health Statistics, Division of Health Examination Statistics, Hyattsville, MD 20782.
Stud Fam Plann. 1990 Sep-Oct;21(5):243-50.
Demographic studies generally use menses to indicate the return of fertility during breastfeeding. In a prospective study of 40 breastfeeding women in Manila, the resumption of ovarian activity was monitored by urinary hormone assays, and menstrual status was determined by weekly interview. For the women who menstruated before six months postpartum, first menses was not a good indicator of ovulation because there was a high proportion of anovular menses (67 percent), and the lag between anovular first menses and subsequent ovulation was 15.7 (+/- 4.4) weeks. After six months postpartum the proportion of anovular first menses declined to 22 percent, and the lag between anovular first menses and ovulation was 7.3 (+/- 4.6) weeks. If all anovular and ovulatory menstrual episodes are considered, the mean interval between first observed menses and first ovulation was 8.4 weeks during the first six months postpartum and only 0.1 week after six months. Thus, in breastfeeding women, menses is an inaccurate proxy measure for the timing of fertility return before six months postpartum, but a good indicator of the resumption of ovulation after six months.
人口统计学研究通常使用月经来表明母乳喂养期间生育能力的恢复情况。在对马尼拉40名哺乳期妇女进行的一项前瞻性研究中，通过尿液激素检测来监测卵巢活动的恢复情况，并通过每周访谈来确定月经状况。对于产后6个月内来月经的妇女，首次月经并不是排卵的良好指标，因为无排卵月经的比例很高（67%），且无排卵首次月经与随后排卵之间的间隔为15.7（±4.4）周。产后6个月后，无排卵首次月经的比例降至22%，无排卵首次月经与排卵之间的间隔为7.3（±4.6）周。如果将所有无排卵和有排卵的月经周期都考虑在内，产后前6个月首次观察到月经与首次排卵之间的平均间隔为8.4周，而6个月后仅为0.1周。因此，对于哺乳期妇女来说，月经在产后6个月内是生育能力恢复时间的不准确替代指标，但在6个月后是排卵恢复的良好指标。
