Ovulation typically occurs about 14 days before the start of the next menstrual period. For someone with a regular 28-day cycle, this means ovulation usually happens around day 14 of the cycle, counting from the first day of the period

. If your cycle is longer or shorter than 28 days, ovulation timing shifts accordingly. For example, in a 35-day cycle, ovulation may occur around day 21

. Generally, ovulation happens between days 11 and 21 of the cycle, with day 1 being the first day of the period

. To summarize:

• In a 28-day cycle, ovulation is about 14 days after the period starts.
• In longer cycles, ovulation occurs later (e.g., day 21 in a 35-day cycle).
• In shorter cycles, ovulation occurs earlier.
• Ovulation timing varies individually and can be tracked using apps or ovulation tests for more precision.

Therefore, ovulation usually occurs roughly 12 to 21 days after the period begins, depending on the length of the menstrual cycle