There is a requirement for the time of injecting urinary prophylaxis, which usually starts on the 3rd-5th day of the menstrual cycle. It is best to inject urinary prophylaxis at the same time every day to keep the concentration of the drug in the blood, which is helpful for follicle development and promotion of ovulation. Regular pelvic ultrasound is needed during the medication to determine follicular growth. Under normal circumstances, the size of mature follicles is 18-25mm. the specific dosage of UTI, the specific number of days of medication, need to be based on the patient’s personal situation under the guidance of the doctor to use the drug, should not overdose in order to avoid overstimulation of the ovary syndrome. The correct use of drugs can promote the development of follicles, if the follicles are mature, you need to arrange for timely coitus, in order to increase the chances of pregnancy, if necessary, after the follicles are mature, to give chorionic gonadotropin intramuscular injection in order to promote the follicle expulsion. 14 days after coitus, go to the hospital to take a blood test to check the hcg in the blood to determine whether you are pregnant or not.