Normally, ovulation occurs immediately after the follicle ruptures and the follicular fluid is released at the same time. After the follicle has matured in the ovary, it ruptures under the action of hormones and expels the egg, which is a normal physiological process for women. After the egg is released, the umbilical end of the fallopian tube catches the egg and transports it to the fallopian tube, where it unites with sperm to form a fertilized egg. After the follicle ruptures, the corpus luteum is formed. The corpus luteum stimulates the body temperature center, resulting in an increase in the woman’s basal body temperature, which usually reaches about 37°C. The high temperature state lasts for at least 12 days, and if the high temperature state lasts for more than 15 days, pregnancy is more likely. In conclusion, the basal body temperature of women during the follicle rupture and ovulation period will rise. Prepared couples can determine the ovulation period by thermometer test or detect ovulation by ultrasound. Women can go to the gynecology clinic within 10 days after intercourse for a blood HCG test to determine if they are pregnant, or they can test with a pregnancy test.