Follicle 2.2*1.6cm usually belongs to the dominant follicle, which can ovulate at any time under normal circumstances. Under normal circumstances, the follicle will develop normally, in the case of the follicle reaches 1.8~2.2cm, it is a mature follicle, and the patient’s follicle 2.2*1.6, usually belongs to the dominant follicle, and ovulation may occur at any time. For women who are preparing for pregnancy, follicles can be monitored by ultrasound to determine the ovulation period, and increasing the number of coitus at the time of ovulation can improve the chances of conception. ultrasound monitoring of follicle value of about 18 to 22mm is the dominant follicle, because ovulation can occur at any time, so coitus can be arranged at this time. It is recommended that women should relax, do not be anxious and nervous, and at the same time do a good job of hygiene and care, and let nature take its course.