Back pain that can occur during ovulation can be caused by the effects of hormones, follicular fluid, and other stimulation of the organs. Ovulation in women occurs about 14 days before the next menstrual period. Most people have no obvious discomfort during ovulation, but some will experience mild pain, bleeding, and backache. Low back pain may be caused by fluctuations in estrogen and progesterone causing changes in ligaments throughout the body, and there may be back pain from prolonged sitting and standing. During ovulation, follicular fluid and eggs are also discharged and accumulate in the pelvis, irritating the peritoneum and causing mild discomfort. The feeling of back pain during ovulation should be mild and tolerable, and if severe discomfort occurs, it is important to seek medical attention to check for problems with the motor system.