Delayed menstruation has little to do with blood in the stool. There are many factors that can cause delayed menstruation, such as sudden changes in the usual living environment, recent overwork or mental stress, and long-term insomnia, which can easily lead to endocrine imbalance in the body, resulting in delayed menstruation and other situations. Delayed menstruation is normal as long as it does not exceed 1 week. Some women who experience delayed menstruation for more than 1 week are considered abnormal. It is necessary to go to the gynecology department of the hospital and take a urine pregnancy test as prescribed by the doctor to confirm whether you are pregnant or not. Excluding the cause of delayed menstruation after pregnancy, the symptoms may be caused by other pathological factors, such as ovarian cysts, polycystic ovary syndrome, or poor ovarian function, resulting in endocrine disorders and other symptoms. You need to cooperate with your doctor for further examination and treatment after diagnosis. Blood in the stool may be a symptom of hemorrhoids or anal fissure.