White fluid on women’s underwear is often clinically caused by vaginal secretions. Under normal circumstances, women have a certain amount of leukorrhea in their vagina, which is milky white and has no odor or only a faint fishy smell. Often, before menstruation, the endometrial glands secrete vigorously, leading to an increase in vaginal discharge, which is normal. This is normal. Also, during ovulation, there is an increase in discharge. This is why there is often some white fluid on your underwear before your period during ovulation. However, if the white fluid has an odor, it is an abnormal phenomenon, and it is advisable to have a routine laboratory test of the white belt. It is also necessary to have a cervical cancer screening test at the same time to find out if there are any local abnormalities in the cervix.