I have read on forums that some girls dont get much CM during their cycle or do not get ECWM but still ovulate (strangly this is something talked about on forums but I have never discussed it with my friends LOL). I think it would be better to try a few methods in trying to identify ovulation like OPKs or charting your temperature. Have you been over to the fertility friend website? There is heaps of info on there about ovulation and temping. I dont think ECWM is always "essential" to pregnancy happening, but it is probably a good sign of ovulation and helps the sperm swim up to the egg. But we are all different so it would not surprise me if some people didnt get it.