The endometrium is too thin and there is no menstruation, there are usually several cases: the first one, it may be caused by adhesions in the uterine cavity, so there will be no menstruation, in which case the adhesions will be separated under hysteroscopy and a contraceptive ring will be placed for three months after the operation. At the same time, the endometrial lining should be repaired with the supplement Glaxo, and the IUD should be removed after three months to see if menstruation can be restored. The second type, caused by low estrogen in the body, can do artificial cycle to supplement estrogen and progesterone, and menstruation will usually return to normal after stopping the pill, and the treatment will take 3-6 months. The third kind, it may be caused by repeated abortions and repeated scraping after damaging the basal layer of the endometrium, resulting in the absence of menstruation. If once this is the case, there is no too good treatment effect and no special medication, also artificial cycle is used to see if menstruation can be restored.