When does a woman's ovulation period start?

Generally, a woman's ovulation period is calculated from about 14 days before the next menstrual period begins, which applies to women with relatively regular menstrual cycles. Specific details are as follows:

A woman's ovulation period typically includes the five days before ovulation, the four days after, and the day of ovulation itself, totaling approximately 10 days. For women with regular menstrual cycles, ovulation usually occurs around 14 days before the onset of the next menstruation. For example, if a woman’s period starts on the 10th of the month, her ovulation period would be from around the 26th of that month to the 10th of the following month. Since this is an approximate timeframe, there may be a margin of error of about two days. Women who are trying to conceive can increase the frequency of intercourse during this window. However, for women with irregular periods, it is often difficult to accurately calculate the ovulation date.

For individuals unable to predict ovulation based on menstrual cycles, ovulation test strips can be used as directed by a healthcare provider to estimate the timing of ovulation.