Ovulation injections are a common technique for assisted reproduction that uses medication to promote the development and expulsion of eggs. Typically, ovulation can occur 24 to 48 hours after the ovulation injection. The exact time varies from person to person. After ovulation treatment, patients should avoid straining as much as possible and pay attention to a healthy diet structure. Post-ovulatory treatment care is essential to promote ovulation. The occurrence of ovulation should be monitored at all times after ovulation promotion. The timing of intercourse should be guided according to the time of ovulation, which will greatly increase the chances of pregnancy. However, if the patient’s follicles are not well developed before the ovulation injection, or if the patient is not well rested after ovulation causing endocrine disorders. Then there will be no significant change in the follicles after the administration of ovulation-promoting drugs. In this case, the ovulation promotion fails and no eggs are released. At this point, you can consider giving ovulation promotion treatment again. After another ovulation injection, ovulation is usually possible 48 hours after the injection. During the treatment period, the patient should always pay attention to the changes in her body and consult the local hospital for the necessary treatment if necessary. As mentioned above, ovulation is usually possible 24 to 48 hours after the ovulation injection.