Women with regular menstrual cycles ovulate each month when one follicle develops and matures. And during ovulation, most people may experience increased leucorrhea, which is stretched, watery, or sticky. A small number of people may have bloody, sticky leukorrhea or coffee-colored, sticky leukorrhea. Most people have no special symptoms when the follicle ruptures and ovulates, but in some people, as the follicle ruptures, the follicular fluid or a little bleeding from the ovary leaks out into the pelvis or abdomen, stimulating the pelvic peritoneum and causing symptoms such as lower abdominal cramping and pain, anal cramping or back pain. If the basal body temperature is taken, it is possible to find a brief drop in body temperature. The most accurate way to determine ovulation is through follicle monitoring, which is detected by ultrasound. If there was originally a mature follicle and after re-examination it is found that the follicle has disappeared and a small amount of fluid is seen in the rectal fossa of the uterus, it can be clearly determined that ovulation has occurred.