From childhood to adulthood, along with the changes in height and size, the internal changes of the body also quietly occur, the gradual improvement of the hypothalamus-pituitary-ovarian axis, the arrival of menarche, the establishment of regular menstruation marks the physiological state of the girl to the woman’s metamorphosis – female sexual maturity has begun! From menarche to menopause, menstruation accompanies a woman for 1/3 of her life. Regular monthly ovulation and menstruation ensure female fertility and provide sex hormones to maintain normal female physiology. A normal female menstrual cycle lasts 21-35 days, with an average of 28 days. Each month, the follicle grows and develops, matures and ovulates, the corpus luteum forms and shrinks, and menstruation occurs in an orderly fashion. Behind these seemingly normal “menstrual events” there is precise regulation from the hypothalamus-pituitary-ovarian axis to make us meet our “old friends” at the prescribed time every month. However, there are always some patients who have “disordered” menstruation, commonly known as menstrual disorders (menstrual disorders) include a variety of gynecological endocrine diseases, the cause of which is the majority of patients with disorders of the hypothalamus-pituitary-ovary axis, ovulation disorders, leading to menstrual abnormalities, and even infertility. Gynecological endocrine disease causes review, there are genetic, environmental, their own physical disease and other factors, bad habits can also lead to menstrual abnormalities. 1, women’s nutritional status and menstruation is closely related to the 19th century in Western countries, the average age of the first menstruation of young girls for 15.5 years old, and now 12.6 years old, which is related to the nutritional status of modern women. As women progress towards sexual maturity, their body fat begins to redistribute: subcutaneous, breast and buttock fat accumulates. Fat plays an important role in female reproduction; it is essential for initiating and maintaining female reproductive function. Excessive high or low body weight will affect the metabolic function of the body and the function of the hypothalamic-pituitary-ovarian axis. 2, obesity will lead to menstrual disorders Female obesity obesity often leads to menstrual disorders, the reason is that obesity interferes with the mechanism of ovulation, resulting in insulin resistance and hyperinsulinemia, and elevated androgens, causing ovulation disorders or no ovulation, followed by scanty menstruation, or amenorrhea, infertility, abnormal uterine bleeding and other conditions, the most common is polycystic ovarian syndrome. Calculation of standard weight: Height (cm) minus 105, actual weight within plus or minus 10% of the average standard weight should be considered normal. Another method is to use the body mass index (BMI), i.e., weight (kg)/height2 (m), and BMI=19-24 is considered normal. Obesity: refers to the actual weight more than 120% of the average standard weight, or BMI ≥ 29 is considered obese. 3, underweight can also lead to menstrual disorders The production of female sex hormones metabolism requires a certain amount of fat, if underweight can also cause menstrual abnormalities, amenorrhea. Commonly used in high-intensity training athletes, dancers, or excessive weight loss often occurs in amenorrhea. 60’s Chinese food famine, many women collectively amenorrhea phenomenon, which is related to the nutritional status of the people at that time is too poor in body fat is too little, research shows that body fat to a certain percentage (16.0-22%) in order to appear menarche, usually the body fat loss of 1/3 of the body will lead to hypothalamic amenorrhea, clinical symptoms of hypoestrogenism, clinical symptoms of hypoestrogenism, amenorrhea, and the body fat to a certain proportion (16.0-22%) can occur. Clinical symptoms of low estrogen, low gonadotropins, and anovulatory infertility. Excessive wasting as the land dries up, the body is not nourished. 4, smoking will damage the ovarian function Research has proved that smoking can damage the ovarian function, resulting in decreased egg quality, decreased fertilization rate, higher abortion rate, early menopause. At the same time, smoking can also aggravate the condition of patients with menstrual disorders. 5, bad mood and menstruation In life, we often see many women due to unexpected events lead to menstrual disorders, or amenorrhea. And this sudden impact of events will certainly have women’s emotional fluctuations, therefore suggesting that women’s bad mood will varying degrees of interference with women’s hypothalamus – pituitary – ovarian axis leading to menstrual disorders or amenorrhea. Common anxiety, depression, anger, insomnia, changes in the rhythm of life will varying degrees of change in menstruation, such as irregular menstrual cycles, premenstrual syndrome, menstrual cramps and even amenorrhea. Therefore, a healthy and regular life, balanced nutrition, and a relaxed and happy mind will all play a positive role in ensuring regular menstruation.