An endometrium of 6mm indicates a thin endometrium, which may be related to endocrine disorders due to ovarian insufficiency, uterine operations, and just after menstruation. 1. Endocrine disorders: the function of ovaries is to secrete estrogen and progesterone, which plays a very important role in the sex hormone balance system. If ovarian insufficiency affects the secretion of estrogen and progesterone, thus causing endocrine disorders. Long-term endocrine disorders will have serious effects on women’s body, which may be manifested as thin endometrium. 2. Intrauterine operation: Intrauterine operation includes abortion and purging, abortion and purging are very harmful to the human body and can cause damage to the uterine lining, which is manifested as thinning of the lining. If repeated abortions or purging surgery will cause the uterine lining to be too thin, or even cause adhesions in the uterine cavity. 3. The end of menstruation: the endometrium will be shed during menstruation, and at the end of menstruation, the endometrium is the thinnest, which may only be 6mm, which is a normal phenomenon, and there is no need to worry. If you check the endometrium 6mm, you need to carry out further examination, and if you find other abnormalities timely symptomatic treatment, and do a good job of physical conditioning.