Normally, women have a regular menstrual cycle once a month and their periods end within 3-7 days. The time between periods is the ovulation period, also known as the danger period, which is about 10 days after the menstrual cycle clears and has a higher chance of pregnancy. If the sperm and egg can combine and develop into a fertilized egg on the fallopian tube, it can lead to pregnancy. If a woman’s ovulation is early or late, she may also get pregnant during the safe period, but the chances are smaller. Women should pay attention to maintain a regular life and avoid staying up late to help normalize their menstrual cycle, so that they can correctly determine the ovulation and safety periods and improve the conception rate.