I have only ovulated once in about 9 years, but when I ovulated, I sure as hell knew it. It was a doubling-over kind of pain. I can't even describe it; Tylenol, Midol, Advil, even prescription meds did not take away that pain. I swear it was worse than any labor I went through (I had c-sections--not by choice--so didn't go through transition).
Oh, just so you don't think I'm a freak, I didn't ovulate because I was on the pill for 7 years. Then I got off because we were going to TTC. 3 weeks later I got a positive pregnancy test. He's now 14 months old and I still haven't got my period back. I'm dreading when I do because there's no way I'm going through hormonal birth control again; I am terrified of that ovulation pain.
I don' tknow if it has anything to do with it or not, but sometimes I felt it on either side and sometimes on both. I had twins the first pregnancy; sometimes I wonder if I *often* have double-ovulation and have a higher chance of twins again. NOt that I'm EVER having any more kids!