Women with regular menstrual cycles have one follicle that develops and matures and ovulates each month. And during ovulation, most people may experience an increase in leukorrhea, which is a pulling, watery, sticky leukorrhea. A small percentage of people may experience bloody, sticky leukorrhea or coffee-colored sticky leukorrhea. Most people have no special symptoms when the follicle ruptures and ovulation occurs, but in some people, as the follicle ruptures, the follicular fluid or a little bleeding from the ovary leaks out into the pelvic cavity and abdominal cavity, stimulating the pelvic peritoneum, causing pain in the lower abdomen, a sensation of anal cramping, or accompanied by symptoms such as lumbar soreness. If the basal body temperature is measured, it is possible to find a brief drop in body temperature. The most accurate way to determine ovulation is through follicle monitoring, which is found through ultrasound. If there was a mature follicle and upon re-examination it is found that the follicle has disappeared and a small amount of fluid is seen in the uterorectal fossa, it can be clearly determined that ovulation has occurred.