How long it takes to ovulate after ovulation injections varies from person to person, and usually you can ovulate about 24-48 hours after ovulation injections. After ovulation injection, as a woman’s ovulation is affected by the menstrual cycle, drug efficacy and drug sensitivity and other factors. The time of ovulation after ovulation injection will also vary, but in most cases, ovulation will occur around 24-48 hours after ovulation injection. If conditions permit, you can have regular reviews and ovulation after treatment with ovulation injections. If there is no ovulation for a long period of time, there may be abnormal ovarian function. If there are no dominant follicles, polycystic ovary syndrome should be ruled out. If necessary, further investigations should be carried out to clarify the cause, adjust the dose and duration of the medication, or change to another ovulation stimulating medication.