There is no direct relationship between low menstrual flow and low sex life. Low menstrual flow is often due to the following clinical reasons: 1, endocrine causes, when the estrogen is insufficient, clinically will cause low menstrual flow; 2, caused by certain diseases, such as polycystic ovary syndrome clinically will lead to low menstrual flow, or even amenorrhea; 3, taking contraceptives, especially short-acting contraceptives clinically will lead to the atrophy of the uterine lining, long-term use will cause a decrease in menstrual flow; 4, due to abortion or diagnostic scraping, resulting in damage to the uterine cavity, which makes the uterine cavity have a complete mucus. Taking contraceptives, especially short-acting contraceptives will cause the endometrium to shrink, and long-term use of contraceptives will lead to a decrease in the amount of menstruation; 4, due to abortion or diagnostic scraping, resulting in damage to the endometrium, and make the uterine cavity appear incomplete adhesion, which will lead to a low amount of menstruation, and the amount of menstruation than the previous period to be reduced by about 1 / 3. So low menstruation is not directly related to the amount of sex.