Ovulation usually occurs a few days after the menstrual period ends.

Generally, the ovulation period occurs a few days after the menstrual period ends, but this depends on whether the menstrual cycle is regular. If the menstrual cycle is regular, ovulation usually begins 7-10 days after the menstrual period ends. However, if the menstrual cycle is irregular, it's not possible to accurately calculate the ovulation period based on fixed days alone, and other methods are needed to determine it. Detailed explanations are as follows:

If the menstrual cycle is regular—for example, consistently lasting 28 days with a menstrual period of about 5 days—ovulation generally starts about 7 days after the menstrual period ends. If the cycle lasts 30 days with a menstrual period of 7 days, ovulation often occurs about 10 days after the menstrual period ends. The ovulation period typically lasts for about 10 days, with the highest probability of conception on the actual ovulation day, which usually occurs approximately 14 days before the next menstrual period begins.

If the menstrual cycle is irregular—for example, if the cycle length varies by more than 7 days or the duration of menstruation is inconsistent—it becomes difficult to accurately estimate the ovulation period based solely on counting days after the menstrual period. In such cases, ovulation test strips can be used to monitor changes in luteinizing hormone (LH) levels in urine, or physical signs such as whether cervical mucus becomes clear and stretchy (like egg white) can be observed to help identify the ovulation period.

To more accurately track the ovulation period, it is recommended to record menstrual cycle lengths and the duration of each menstrual period to establish a personal menstrual cycle chart.