How many days after the end of menstruation is easy to get pregnant is related to the menstrual cycle and ovulation period, and it is usually easiest to get pregnant when you have sex during the ovulation period. Because pregnancy occurs when a sperm combines with an egg cell to form a fertilized egg and lays in the uterus, it is easier to get pregnant during ovulation. The timing of ovulation varies slightly due to differences in each person’s menstrual cycle. Usually, 14 days before the next menstrual period is the day of ovulation, and 5 days before and 4 days after the day of ovulation plus the day of ovulation is called the ovulation period. Therefore, for women with a 28-day menstrual cycle, ovulation occurs around 10-19 days after menstruation, and if menstruation occurs for 5 days, it is easier to get pregnant if you have sex around 5-14 days after menstruation. For women whose menstrual cycle is not 28 days long, the calculation can be done in the same way. In addition, for women with disrupted menstrual cycles who cannot determine ovulation by calculating the time, they can choose ovulation test strips or ultrasound to monitor the follicles to determine the ovulation period.