The temperature difference between morning and evening during ovulation is an important factor in the fertility process because temperature changes can affect a woman's fertility. During ovulation, a woman's body temperature will rise, but the temperature difference between morning and night will be more obvious.

However, it's worth noting that changes in a woman's body temperature can be affected by many factors, such as diet, exercise, stress and rest. Therefore, a woman's period of elevated body temperature may vary and is difficult to predict accurately.

In addition to changes in body temperature, a woman's menstrual cycle is also affected by her ovulation period. During ovulation, women's hormone levels change, which can affect their sex drive and fertility. Therefore, women should pay close attention to their body temperature changes and menstrual cycles to ensure they have healthy children.

In short, the temperature difference between morning and evening during ovulation is very important for women's fertility. Women should pay close attention to their body temperature changes and menstrual cycles to ensure they have healthy children.