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目的:探讨广东省育龄妇女在月经周期中不同时机性生活对妊娠率的影响。方法:选择年龄21～35岁健康已婚、月经正常、有意愿怀孕的妇女。纳入研究期间不采取避孕措施,在预计排卵日前7天(-7)开始至排卵日后3天(+3),每天测尿LH、BBT等,受试者在-7～+3时间内尽可能只有1次性生活,将月经情况和确切的性生活日期记录在月经卡上。结果:纳入研究的对象共98人,观察245周期,72周期妊娠,平均妊娠率为29.39%;而在-7～+3期间仅有单次性生活的周期91个,其中15周期妊娠,平均妊娠率为23.08%。按在预计排卵日-7～+3对应的某一天性生活计算妊娠率:分别为:0、0、20%、18.75%、26.67%、34.38%、35.71%、31.25%、22.22%、20%、0。结论:在月经周期中性生活时机不同,其妊娠率有差异,以预计排卵日-3～0日期间性生活妊娠率较高。在-7～+3期间仅有单次性生活者较有多次性生活者妊娠率低。
Objective: To investigate the effect of different timing of women of childbearing age on pregnancy rate in Guangdong Province during the menstrual cycle. Methods: Select the age of 21 to 35-year-old healthy married, normal menstruation, pregnant women are willing to. During the study period, no contraceptive measures were taken. Urine LH and BBT were measured every day from 7 days before ovulation (-7) to 3 days after ovulation (+3). Subjects were as far as possible within -7 ~ + 3 Only one sex life, the menstrual conditions and the exact date of sex recorded in the menstrual card. Results: A total of 98 subjects were enrolled in this study. The average pregnancy rate was 29.39% in 245 cycles and 72 cycles. In the period between -7 and + 3, there were 91 cycles of single-sex life, of which 15 cycles were average The pregnancy rate was 23.08%. According to the estimated ovulation day -7 ~ +3 corresponding to a certain day-to-day life calculated pregnancy rates were: 0,0,20%, 18.75%, 26.67%, 34.38%, 35.71%, 31.25%, 22.22%, 20% , 0. Conclusion: The timing of sexual life in the menstrual cycle is different, the pregnancy rates are different, in order to predict the ovulation day - 3 to 0 during the pregnancy rate higher sex life. During the period from -7 to +3, there was only a single sex life with more pregnancies than multiple sex life.