How soon will the egg be discharged by the egg-breaking injection is related to the patient’s specific condition, physical condition and so on, and needs to be analyzed according to the specific situation. Egg-breaking injection can promote the discharge of eggs, mainly used for patients with difficulties in egg discharge, such as patients in the ovulation period to do ultrasound examination, the follicle has developed and matured, but the egg is not discharged, and the follicle is directly luteinized. This kind of patients can resort to the egg-breaking needle to promote the mature follicle to discharge the egg. Generally, ovulation will occur 24-48 hours after the egg-breaking injection, or 12 hours after the fast one, with some individual differences. It is recommended to arrange intercourse a day or so after the injection to improve the chances of conception. However, some patients may not ovulate even if they break the injection, so they need to go to the gynecology department of a regular hospital in time to complete the relevant examinations to identify the cause and carry out targeted treatment. Patients need to relax after breaking the egg injection, mental stress should not be too large, to maintain the best state. In addition, pay attention to diet and nutrition, balanced, work and rest, avoid overwork, stay up late and so on.