After ovulation, the body temperature will rise by 0.3-0.5℃ compared with the temperature before ovulation. This is due to the female ovulation, the body progesterone level is relatively high, progesterone can have a role in regulating the body temperature center, can make the body temperature regulation rise 0.3-0.5 ℃, such a temperature change will be able to see whether the woman is ovulation, and this rise in body temperature to maintain 14 days, if less than 14 days means that the female body luteal body is insufficient. If a woman is pregnant, the temperature will remain the same. If she is not pregnant, the temperature will drop again after 14 days of menstruation and return to the normal body temperature.