In the early stage of menopause, the ovaries are not functioning well and stop ovulating. Although the ovaries stop secreting estrogen directly, the interstitium of the ovaries can still secrete a small amount of androgen, which can be converted into estrogen through the action of certain conversion enzymes. Generally speaking, after the age of 60, women’s bodies enter the aging stage and ovarian function is in complete failure, at which time estrogen levels will be measured at a relatively low level, but a certain amount of estrogen can still be measured.