A 5mm thick endometrium during menopause can be a normal physiologic phenomenon. The endometrium after menopause, due to the decline in menopausal hormone levels, estrogen and progesterone levels drop to the level of menopause, it causes the endometrium to shrink. After menopause, the endometrium can usually reach about 4mm, so clinically, if the ultrasound examination finds that the thickness of the endometrium is 5mm in a menopausal woman, there is no irregular bleeding, and at the same time the endometrial echogenicity is relatively homogeneous, then the endometrium of 5mm in the menopause, is a normal phenomenon. If there is a combination of uneven endometrial echogenicity or irregular bleeding, appropriate clinical examination and management should be recommended.