The number of days after a period considered safe to avoid pregnancy depends on the length of a person's menstrual cycle and their individual fertility. Generally, the fertile window—the time when pregnancy is most likely to occur—occurs around the time of ovulation, which typically happens around the midpoint of the menstrual cycle. In a typical 28-day menstrual cycle, ovulation occurs around day 14. Therefore, the days immediately following menstruation (days 1-7) are often considered less fertile, as ovulation is unlikely to occur during this time. However, it's important to note that sperm can survive in the female reproductive tract for up to five days, so there is still a risk of pregnancy if unprotected intercourse occurs during this time. Additionally, menstrual cycles can vary in length, and ovulation may occur earlier or later than expected, making it challenging to rely solely on timing to avoid pregnancy. For reliable contraception, it's essential to use other methods such as barrier methods, hormonal contraception, or fertility awareness methods in consultation with a healthcare provider. Read more in Detail about how many days after period is safe to avoid pregnancy