, and I would probably not need to chart anything other than the pre-ovulatory pain I get. "Pain" is actually a pretty strong word; it's more like a sore muscle ache kind of feeling in my lower pelvis, at about where my ovaries are. It sticks around for about 4-5 days, increasing in intensity as the fluid becomes more fertile; and then disappears the moment I do ovulate and the fluid dries up. Some women experience a shooting kind of pain when the egg is actually released, some have sore breasts. There are lots of individual signs, that when paid attention to, can be immensely helpful. With all these clues, who needs an ovulation calculator?