There are many possible reasons for not having a period for a month and not getting pregnant, including endocrine disorders, excessive weight loss, uterine adhesions, premature ovarian failure, polycystic ovary syndrome, perimenopausal ovarian decline, etc. The general situation can be judged according to the symptoms, and if there is any abnormal performance, timely medical consultation is required. 1. excessive weight loss: it can lead to reduced menstrual volume, delayed menstruation or even amenorrhea, accompanied by dull skin and reduced elasticity, etc. It is recommended that women avoid using too many diet pills or dieting and choose healthy ways to lose weight, such as active physical exercise; 2, endocrine disorders: there can be delayed menstruation, insomnia, abnormal emotional irritability and other symptoms, hormone six tests and ultrasonography should be done to clarify the diagnosis, and hormonal drugs can be used as prescribed by the doctor; 3, cavity adhesions: there can be abnormal menstruation, amenorrhea accompanied by periodic abdominal pain symptoms, feasible Ultrasound and hysteroscopy can be used to confirm the diagnosis, and surgery is needed if necessary; 4. polycystic ovary syndrome: often with scanty menstruation or even amenorrhea, accompanied by symptoms such as hirsutism and acne, serum hormone level measurement and ultrasound examination should be done to confirm the diagnosis. It is recommended that vaginal ultrasound examination and blood hormone level should be performed to confirm the diagnosis, and estrogen and progestin replacement therapy should be applied as prescribed by the doctor. In addition, testing by yourself through early pregnancy test paper or pregnancy test in early pregnancy may give false negative results. It is recommended that you need to test again after one week or go to the hospital for clear examination through blood HCG and gynecological ultrasound.