It is usually easier to get pregnant when you have intercourse during the ovulation period. When a woman has a normal menstrual cycle, the day of ovulation is 14 days backwards from the first day of her next period, and the ovulation period is the 5 days before and 4 days after the day of ovulation combined. After ovulation, a mature egg can survive in the fallopian tube for about 48 hours at most, while sperm can survive in the female reproductive tract for 1-3 days, but the best fertilization ability is mostly within 48 hours. Therefore, under normal circumstances, having intercourse during ovulation, especially within 48 hours before and after the day of ovulation, is the easiest time to get pregnant. Therefore, it is not too easy to accurately calculate your ovulation day. In addition, some women’s menstrual cycles may not be regular and the range of ovulation cannot be accurately deduced. You can use ovulation test strips, ultrasound to monitor ovulation and other methods to help determine the day of ovulation before having intercourse, which can improve the chance of pregnancy.