催经是指在平时月经周期正常,月经延迟一周内,采用药物或者机械手段使月经来源,也称月经调节。药物催经作为各种避孕方法失败的补救措施因其简便无创伤以及避免宫腔操作造成的并发症而更容易被接受。由于现在的检测手段还不能在停经3～5d内准确的诊断妊娠,故在催经的病例中很难 Mechatronics refers to the usual menstrual cycle normal, menstrual delay within a week, the use of drugs or mechanical means to make the source of menstruation, also known as menstrual regulation. As a remedy for the failure of various contraceptive methods, drug reminiscences are more readily accepted because of their simplicity and non-invasiveness and avoidance of complications resulting from intrauterine procedures. Due to the current testing methods are not yet accurate in the diagnosis of pregnancy within 3 ~ 5d menopause, it is difficult in the case of menopause