I'm in the minority here, but the only thing I ever discovered about temping & charting was that my cycles are truly messed up! I don't do it anymore. I would never have any indication of ovulations, and my charts were what are called tri-phasic. B/w & u/s is the only way I know what's going on with my wonky body. But I do think that if you don't temp/chart, that you should, just to see if your body produces any semblance of a pattern from cycle to cycle.