It is also normal to have a period once every two months. Most women have a menstrual cycle of 28-30 days, and clinically it is considered normal to have a menstrual cycle within 21-35 days. The menstrual cycle of individual women may be relatively extended to about two months, but as long as it is regular, it is normal and this is my menstrual cycle. For people with long menstrual cycles, it is best to do ovulation monitoring. As long as there is normal ovulation monitored, no special treatment can be given and monitoring can be done by ultrasound monitoring or ovulation test strips. Even in this case, a regular gynecological examination is recommended once a year to find out if there are abnormalities in the cervix, vagina and pelvis, and screening for cervical cancer is needed to rule out cervical lesions. Therefore, as long as there is normal ovulation, it is normal to have a period once every two months.