【摘要】 目的　探讨不同月经周期的卵泡发育情况及排卵时间 ,确定超声监测排卵的时间范围 ,提高超声预测排卵时间的准确率。方法　对 5 6 0例 2 4～ 6 0 d不同月经周期的育龄不孕妇女采用月经周期倒计时法 ,即下个月经周期前第 2 0 d开始超声监测排卵时间 ,并分组对照分析研究。结果　月经周期规律组和不规律组的排卵时间距下个月经周期的时间均相对恒定 ,排卵时间为下个月月经周期前第 1 5～ 1 8d,平均为下个月月经周期前第 (1 6 .4± 1 .0 ) d。结论　采用月经周期倒计时法监测排卵时间即下个月月经周期前第 2 0 d开始超声监测 ,既减少不必要的超声次数 ,又没错过卵泡发育的监测机会更多还原

【Abstract】 Objective This article aimed at exploring follicular growth situations and ovulation time of different menstrual cycles,determining the ovulation time observed by B ultrasound and increasing the accuracy of ovulation time predicted by B ultrasound.Methods With different menstrual cycles ranging from 24 to 60 days,560 infertile women’s ovulation time was examined They were all detected by B ultrasound through menstrual cycle count down method which means from 20 days before the next menstrual cycle.The result was analyzed in different categories.Results Compared with the next menstrual cycle,the ovulation time of women in regulation and indiscipline categories remained relatively stable.The ovulation time lay in the 15th to 18th day before the next menstrual cycle.The average ovulation time is day (16 4±1 0) before the next menstrual cycle.Conclusions The countdown method adopted can reduce the unnecessary B ultrasonographie examinations and will not miss the chances to investigate the follicular growth situation.The method has value of wide use because of its simplicity,quickness,cheapness,safety,accuracy and reliability.更多还原