Urinary gonadotropin 75 units to give injections to promote ovulation, the general is injected continuously for about 3 days ultrasound to monitor follicular growth, according to the follicle growth rate, number and size of the adjustment of drug dosage. Most of the follicles grow at a rate of about 1.5mm per day, and when they reach a diameter of 20mm, intramuscular chorionic gonadotropin injections can be given to promote follicular rupture and discharge of eggs. If the number of dominant follicles is more than 3, the medication and the trial of pregnancy in this cycle need to be canceled in order to avoid multiple pregnancies. During ovulation promotion, you must pay attention to find out whether the bilateral ovaries are enlarged and whether there will be any symptoms of ovarian hyperstimulation, such as dizziness, nausea, vomiting, pain in the lower abdomen, or low urine output, which should be taken very seriously. Go to the hospital as soon as possible to rule out ovarian hyperstimulation and provide the necessary intervention.