There are two main possibilities for increased leucorrhea after intercourse during ovulation: first, physiological increased leucorrhea. It is mainly caused by the fact that during ovulation, the patient’s estrogen and progesterone levels increase, causing the patient’s reproductive tract secretory glands to secrete abundantly. The physiological leucorrhea is limited to the increase in the amount of leucorrhea, the color and smell of the leucorrhea are normal, and the patient does not have vulvar itching discomfort, this situation does not need to be treated. Second, the pathological leucorrhea increase. Patients do not do a good job of hygiene when they have intercourse, or men with pathogenic bacteria, so patients will have inflammatory diseases after intercourse, resulting in increased leucorrhea. The patient not only has an increased amount of leucorrhea, the color of the leucorrhea is also abnormal, such as yellow-green, the patient’s leucorrhea smell is also abnormal, mainly fishy smell, the patient will also be accompanied by vulva, vaginal local pain, itching. Patients need to have a gynecological examination and take a laboratory test of the leucorrhea to determine the type of inflammation and then treat the symptoms.