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The fertile period lasts about 6 days and usually happens 14 days after the first day of menstruation, in women who have a menstrual cycle of 28 days, which is considered regular.
This period is considered fertile because during this period there is an increase in libido and greater production of vaginal secretion, which favors the displacement of sperm through the fallopian tubes, for example, which manage to survive about 5 days, in addition to corresponding to the period in which ovulation occurs.
Thus, this fertile period is calculated taking into account that you are most likely to get pregnant 5 days before ovulation and 1 day after ovulation, since the egg's lifespan is approximately 1 day. For example, if a woman has intimate contact on day 5, and if that is the first day of her fertile period, her egg is probably not yet mature.However, the sperm can remain inside the vagina until day 8, which is when ovulation can occur, and it is still possible to be fertilized by the sperm that remained alive, which can result in the conception of a baby.
How to calculate the fertile period?
Ovulation occurs 14 days before menstruation, and usually, in women with a 28-day cycle, happens halfway through. However, many women have shorter or longer cycles, and in these cases it can be more difficult to know when ovulation occurs.
To calculate the fertile period, just subtract 14 days from the number of days in the cycle. For example, in a woman who has a 32-day cycle, if 14 days are subtracted, she gives 18, which means that ovulation occurs on the 18th day from the first day of menstruation. The fertile period is then the period of time that comprises the 3 days before and 3 days after ovulation, i.e. between day 15 and day 21.
Therefore, a woman trying to conceive should have as much sexual intercourse as possible during this period.
Watch the following video and see an example of how to calculate the fertile period of a woman with a 28-day cycle:
How do I know if I'm fertile?
A woman may notice some changes in her body that may indicate that she is entering the fertile period, such as an increase in transparent vaginal secretion, an increase in libido, an increase in temperature, the appearance of acne and pain in the lower abdomen, for example.. See more about fertile period symptoms.