In order to calculate the fertile period it is necessary to consider that the conception always happens in the middle of the cycle, that is, around the 14th day of a normal cycle of 28 days.
In this way, to know when the fertile period is, it is necessary to count 14 days from the date when your last menstruation came. The ovulation will occur between 3 days before and 3 days after that date, which is what is considered the woman's fertile period.
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How to calculate the fertile period with irregular cycle
Calculating the fertile period in the irregular cycle is not safe for those who are trying to get pregnant or for those who do not want to get pregnant, because as the menstrual cycle does not always come in the same period, the bills may be wrong.
However, one way of knowing when the fertile period is in case of irregular cycle is to note the duration of each menstrual cycle for one year and then subtract 18 days to the shortest cycle and 11 days to the longest cycle.
For example: If your shortest cycle was 22 days and the longest cycle of 28 days, then: 22 - 18 = 4 and 28 - 11 = 17, ie the fertile period will be between the 4th and the 17th days of the cycle.
A more rigorous way of knowing the fertile period in case of irregular cycle for women who wish to become pregnant is to resort to the ovulation test that is bought at the pharmacy and be alert to signs of fertile period, such as egg white discharge. For those who do not wish to get pregnant, the table is not an effective method and, therefore, it is important to use safe contraceptive methods, such as a condom or a contraceptive pill, for example.
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