A follow-up ultrasound is needed about 24 hours after the egg-breaking shot. Ovulation occurs 24 to 48 hours after the egg breaking shot, with an average of about 36 hours. It also depends on the timing of the egg-breaking injection; if LH has peaked, progesterone is elevated, and estrogen has dropped by about half, ovulation may occur within 24 hours. When ultrasound monitors that the follicle is about 18×20mm, it is a mature follicle. If the mature follicle is delayed, or if the woman has ovulation obstacles at ordinary times, etc., medication can be used to promote the rupture of the follicle, so that the egg can be successfully discharged, and the chances of pregnancy can be improved. About 24 hours after the injection of follicle-breaking ultrasound, if ovulation occurs, the couple will be instructed to have intercourse to improve the pregnancy rate, and after 7 days of coitus, blood will be drawn to check the human chorionic gonadotropin, to determine whether pregnancy is occurring or not, and the uterine adnexa ultrasound will be checked for more than 40 days to further clarify the diagnosis. If ovulation disorder occurs and affects normal pregnancy, it is recommended to go to the hospital in time for treatment.