menses

Fertile window is the time in every women’s cycle when pregnancy can occur, says experts.

To understand your fertile window, it is important to keep track of your cycle and stick to the calendar method which is the most reliable way to note the changes in your body monthly.

To calculate your fertile window correctly, you need to determine:

Your menstrual cycle: The first day of the last menstrual bleeding to the first day of the present menstrual bleeding. This duration varies from person to person and is usually between 26 to 31 days. It is very important to keep a menstrual calendar for a few months to check your cycle.

You Ovulation Days: Which usually occurs halfway through your cycle. Ovulation happens about two weeks before the next expected period. So if your average menstrual cycle is 28 days, you will probably ovulate around day 14.




According to fertile centre, there is a difference between your fertile days and ovulation days. Your fertile days are the 4-5 days before ovulation and the day of ovulation while the most fertile days are the 2 days before ovulation and the day of ovulation.

The ‘fertile window’ begins five days prior to ovulation and ends the day after an egg is released. Depending on your cycle length the most fertile days in the cycle varies:

For example, a regular 28-day menstrual cycle with ovulation at day 14-15, your fertile days would be around day 10-11-12-13-14.

If you have longer cycles, say 35 days between periods, ovulation happens on day 21 and the most fertile days are days 19, 20, and 21.

If you have shorter cycles, say 21 days between periods, ovulation happens on day 7 and the most fertile days are days 5, 6, and 7. These few days are the ‘fertile window’ in a woman’s cycle

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