In general, leukorrhea is more frequent in the early and middle stages of ovulation, and decreases in the last days of ovulation, which is caused by women’s own physiological changes. Ovulation generally refers to the period from 5 days before to 4 days after the day of ovulation, which is the stage with the most amount of leucorrhea except before and after menstruation, but the amount and nature of leucorrhea at this stage also vary slightly: 1. The leucorrhea is clear and transparent, mucus-like, with increased toughness, and can be pulled out in long strands, which usually lasts 3-5 days; 2. After ovulation: the amount of leucorrhea is less than before, sticky and cloudy in color, which is a sign of decreasing estrogen levels. The change of leucorrhea during ovulation is a normal physiological phenomenon, but it is not recommended that women take the change of leucorrhea at this time as a criterion to prepare for pregnancy whether they are ovulating or not. This is because leucorrhea changes in women may also be caused by pathogenic infections, foreign bodies in the reproductive organs and other factors that stimulate the reproductive system. Therefore, when there is a yellowish color of the female leucorrhea, accompanied by itching and odor of the vulva, it is recommended to go to the hospital promptly.