A month without menstruation is not necessarily pregnancy, stress, late night, tired, etc. may also cause menstruation delay, delayed up to a week are normal phenomena. If your period is regular and you are sexually active, it is possible that you may be pregnant if your period is delayed. If your period is delayed for more than a week, you can go to a regular hospital to check your blood or urine chorionic gonadotropin level to determine whether you are pregnant. If you are pregnant, you should pay attention to rest, strengthen the nutrition, oral folic acid tablets, regular maternity checkups, and stay away from radiation, so as to facilitate the development of the fetus. If you are not pregnant, avoid staying up late, relax, pay attention to abdominal warmth, more than a week of menstruation has not come, it is recommended to go to the hospital obstetrics and gynecology consultation. Treatment under the guidance of the doctor.