Dysmenorrhea can affect fertility. Common causes of dysmenorrhea: First, dysmenorrhea may be caused by coldness in the uterus, stagnation of blood and blood stasis, resulting in poor circulation of menstrual blood, which can lead to menstrual disorders. It is also possible that a woman’s cervix is too tight or the uterus is excessively tilted forward or backward, which is not conducive to the smooth discharge of blood from the uterine cavity or to the smooth passage of sperm through the cervix to the fallopian tubes and the egg after sex. When a woman suffers from endometriosis, she will also suffer from severe menstrual pain, and the increase in menstrual flow will lead to pelvic inflammation, which will prevent the ovaries from ovulating normally, and if the fallopian tubes are blocked, it will lead to infertility or increase the chance of ectopic pregnancy. When women suffer from dysmenorrhea, it is important to actively look for the cause and treat it accordingly in order to improve the conception rate.