The follicles of women are generally 1.8-2.5 cm in diameter and are mature follicles, which may ovulate at any time within this size range, because the development of female follicles is a continuous process. When the size of the follicle exceeds 1.8cm, it is a mature follicle and may complete ovulation at any time. The follicle diameter is generally not allowed to exceed 2.5cm, because follicles that exceed this range have lost their egg activity and cannot complete normal ovulation, and as the follicle increases in size, it can easily develop into a cyst, but most of the cysts formed by the continuous increase of the follicle are physiological luteal cysts, and most of them will disappear naturally with the woman’s next menstruation and generally do not require No special treatment is needed.