Endometrial thickness of 15mm depends on what period of time the symptoms appear, so as to decide whether to scrape the uterus: 1, if the simple endometrial thickness is 15mm, it may be to come to menstruation, is the endometrial changes before menstruation, no clinical bleeding does not require scraping treatment. 2, if the endometrial thickness of 15mm, accompanied by irregular vaginal bleeding for more than 10 days, scraping treatment can be performed. 3, just after menstruation, endometrial thickness of 15mm indicates that endometrial exfoliation is difficult and requires scraping and pathology to exclude endometrial lesions.