There are many reasons for low estrogen levels, specifically the following: 1. Related to lifestyle habits, if women drink alcohol and smoke for a long time, there is a certain chance that this will lead to lower estrogen levels. 2. Genetic factors, this condition may have premature ovarian failure, so it will lead to a decrease in estrogen levels. 3. Patients who have had multiple abortions or induced abortions will lead to a decrease in ovarian function, thus lowering estrogen levels in the body. 4. 4. exposure to radiation, for example, some patients need to undergo multiple radioactive examinations and treatments because of certain diseases, which can cause damage to the ovaries, thus reducing estrogen levels. 5. prolonged use of contraceptive drugs, which can suppress ovarian endocrine function and cause low estrogen levels. 6. menopausal women, which are physiologically Ovarian function declines, and estrogen levels can drop rapidly.