How many days does the fertile period last?
The fertile period lasts about 6 days and usually happens between 10 to 14 days after the first day of menstruation, in women who have a 28-day menstrual cycle, which is considered regular.
This period is considered fertile because it is when ovulation occurs, which consists of the release of the egg by the ovary, making it available to be fertilized by a sperm, which can survive for about 5 days. Thus, this fertile period is calculated taking into account that there is a greater probability of becoming pregnant 5 days before ovulation and 1 day after ovulation, since the life span of the egg is approximately 1 day.
For example, if a woman has intimate contact on the 5th, and if this is the first day of her fertile period, her egg is probably not yet ripe. 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 may result in the conception of a baby.