The yellowing of the leucorrhea during ovulation is due to infection with bacteria, or pathogens that cause the leucorrhea to be yellow. The normal ovulation leucorrhea should be colorless and transparent, and there is a pulling of silk, which belongs to the leucorrhea of the ovulation period. If you find yellowish, greenish, odorous, etc., consider that it is caused by an infection, you need to go to the hospital for a routine examination of the white belt and mycoplasma and chlamydia, and then treat it by intravaginal application of medicine. You need to pay attention to the cleanliness of the vulva and wash it every day. If there is inflammation or pathogenic infection, you need to treat it in time. It is also necessary to go outdoors more often to exercise and improve the immune system, which can reduce the recurrence and invasion of these inflammatory diseases.