With 48 days of menopause and 17mm endometrium it could be pregnancy or it could be fast approaching menstruation, perimenopausal patients, endometriosis also needs to be ruled out. The thickness of the uterine lining is different at each stage, usually the normal is almost around 3mm-12mm, so the uterine lining 17mm is a bit thick. If you have had sex, then do not rule out the case of pregnancy, you need to go to the hospital to improve the HCG test, pre-pregnancy due to changes in hormone levels, which can easily lead to endometrial thickening. If you exclude the case of pregnancy, do not rule out the possibility of fast menstruation reasons, you can promptly consult a doctor, under the doctor’s instructions to choose drugs for treatment, such as progesterone capsules, dydrogesterone tablets and so on. If perimenopausal women, found that the endometrium has abnormal thickening, also need to rule out whether it is endometriosis. Clinically, when a woman finds that her endometrium is 17mm thick, it is recommended that she go to the hospital for timely medical treatment, improve the examination under the guidance of the doctor to clarify the cause of the disease, and carry out diagnostic curettage if necessary, and take the local tissues for biopsy.