The period of time between the 1st day of a woman’s 2 periods is the woman’s biological cycle. If a woman’s period is on June 3 and her next period is on July 3, the interval between the two periods is 30 days, and a woman’s menstrual cycle is 30 days. Most women have a menstrual cycle of about 30 days, and the menstrual cycle of women fluctuates from 21 to 35 days, and as long as it is within this range, it is a normal menstrual cycle. There are some patients who have a fixed menstrual cycle, such as once every two months, once every three months, or even once every six months, with normal menstrual periods and normal menstrual volume. However, the chances of conception are relatively lower in this case. If you want to improve the chances of conception, you can use artificial cycles to regulate your menstruation.