If an adolescent girl who has just started menstruating does not have a period for more than two months, this is usually a normal situation because the function of the hypothalamic-pituitary-ovarian axis is not yet mature and there is usually no need to worry too much. In the case of women of childbearing age with a history of sexual intercourse, the first thing to consider is the possibility of pregnancy. Early pregnancy reactions such as nausea, vomiting, loss of appetite, fatigue and drowsiness usually occur around 6 weeks of pregnancy and can be confirmed by testing with early pregnancy test strips or performing blood HCG and ultrasonography. If the pregnancy is intrauterine and there is a birth plan, regular obstetric checkups should be performed. If the pregnancy is ectopic, medication or surgery can be performed to terminate the pregnancy. If pregnancy is ruled out, the absence of menstruation for more than two months may be caused by endocrine disorders, drug effects or uterine cavity adhesions and endometrial damage: 1. Endocrine disorders: endocrine disorders can cause menstrual cycle disorders, which can result in the absence of menstruation for more than 2 months. Endocrine disorders can be caused by a variety of reasons, if it is a lack of sleep, stress, or emotional state of anxiety and depression in recent months, it may cause endocrine disorders, accompanied by excessive oil secretion from the skin, acne, etc. Generally, by ensuring sufficient sleep and adjusting the mood can improve the condition of menstruation does not come. Endocrine disorders are also related to certain diseases, such as hypothyroidism, polycystic ovary syndrome, etc. It is recommended to do hormone six tests and ultrasound to make a clear diagnosis, and the treatment can be regulated by using hormones and other drugs as prescribed by the doctor; 2, drug effects: if you take progestin drugs, such as dydrogesterone, you may not get your period for more than two months, which is generally due to the action of the drug in the body, delaying the shedding of the uterine lining. The endometrial shedding can return to normal after some time; 3. Uterine adhesions and endometrial damage: It may also lead to the absence of menstruation for more than two months, or even amenorrhea, accompanied by the symptoms of periodic abdominal pain, which can be diagnosed by ultrasound and contrast examination, and if necessary, surgery. It is important to note that if the ultrasound examination reveals a thick endometrium, which suggests that menstruation may be imminent, a follow-up visit can be performed first.