A woman’s menstrual cycle is usually 28 to 30 days. It is still normal to be about 7 days early or late, and the length of the cycle varies from person to person. However, if you do not have your period after 7 days, you are considered to have delayed menstruation. There are many reasons for delayed menstruation, such as mental tension, stress, environmental changes and other psychological factors, some endocrine disorders, etc., can cause delayed menstruation. For example: 1, living in excess According to research, women are stimulated by cold during menstruation, which can cause excessive vasoconstriction in the pelvic cavity and can lead to menstrual hypomenorrhea and even amenorrhea. Therefore, women’s daily life should be regular, avoid overworking, especially during the period to prevent cold and avoid damp. 2, emotional abnormalities Long-term mental depression, sulking or suffering from major mental stimulation and psychological trauma can lead to menstrual disorders or dysmenorrhea, amenorrhea. This is because menstruation is formed after the hormones secreted by the ovaries stimulate the endometrium, and the hormones secreted by the ovaries are controlled by the pituitary and hypothalamus releasing hormones, so whether the ovaries, pituitary, or hypothalamus function abnormally, it will affect menstruation. 3, excessive dieting The expert research shows that the fat of young girls accounts for at least 17% of their body weight before the first menstruation can occur, and the body fat reaches at least 22% of the body weight in order to maintain a normal menstrual cycle. Excessive dieting, due to insufficient energy intake of the body, resulting in a large amount of fat and protein is consumed, resulting in estrogen synthesis disorders and a significant lack of, affecting the menstrual flow, or even menstrual scarcity or amenorrhea, therefore, the pursuit of slim women, do not blindly dieting. 4, excessive weight loss Some women in order to achieve significant weight loss effect, not only control diet, but also take a variety of weight loss drugs, such excessive weight loss can also cause menstrual delay. 5, mental stress heavy workload, excessive mental tension, emotional depression, these are the causes of delayed menstruation. Stress in daily life will more or less affect women’s menstruation, so you need to adjust your emotions and maintain an optimistic and positive attitude. 6, thyroid dysfunction Many women have abnormal thyroid problems, such as hyperthyroidism, or underground thyroid function, which can lead to reduced menstruation and delayed menstruation. 7, lack of vitamin E Vitamin E is mostly stored in various cooking oils, too light a diet can cause a lack of vitamin E, resulting in irregular menstrual cycles, so it is particularly important to supplement vitamin E at this time. 8, menstrual disorders Diet, lifestyle and other factors can lead to menstrual disorders, delayed menstruation is also a type of menstrual disorders, such as the gradual decline of the reproductive function of middle-aged women, hormone secretion disorders, menstrual cycle disorders, followed by delayed menstruation. 9, constipation Constipation may cause menstrual disorders in women. After excessive filling of the rectum with stool, the cervix will be pushed forward and the body of the uterus will be tilted back. If the uterus tilts back repeatedly for a long time, the veins in the broad ligament will be pressed and not open, and the uterine wall will become congested and lose elasticity. If the uterus is kept in a posteriorly inclined position for a long time, back pain and menstrual disorders may occur.