A Chinese article titled Ovulation is a dangerous period:

During ovulation, a woman's body temperature will rise by 0.5 to 1 degree Celsius. This is because hormone levels in women change, causing the body's basal body temperature to rise. This process of increasing body temperature is called "basal body temperature increase."

During this period, women's bodies will experience some special physiological reactions. For example, they may feel more sensitive, tire more easily, and their appetite may increase. Additionally, they may also feel more aroused, think more clearly, and may have an increased sexual desire.

These physiological reactions may increase a woman's risk of pregnancy. Because if a woman is fertilized during this period, the fertilized egg may implant and develop in the uterus, increasing the risk of pregnancy.