Quarreling and crying a lot a few days before menstruation may lead to delayed menstruation, but not necessarily, each person varies. The normal menstrual cycle is 21-35 days, with an average of 28 days. A delay in menstruation of more than 7 days of the normal cycle is called delayed menstruation, which can be caused by physiological factors such as staying up late, stress, pregnancy, etc., or by pathologic factors such as tuberculosis of the reproductive system and polycystic ovary syndrome. Quarreling and crying a lot, emotional fluctuations, it is easy to affect the endocrine system of women, will lead to endocrine dysfunction, causing the ovaries to secrete estrogen and progesterone disorders, interfering with the process of proliferation of the uterine lining, delayed shedding of the uterine lining leading to delayed menstruation. There are many other reasons for delayed menstruation. If delayed menstruation occurs, you should go to the hospital in time to improve the relevant examination and treat the symptoms under the guidance of the doctor.