The kind of cm that you are looking for should be egg white in consistency. Sometimes women only get watery cm which is absolutely fine. Also, using ovulation predictor kits can help in determining the best days to have sex and conceive. Remember, it can take a healthy couple up to a year to conceive. If you are under 35, see a doctor after one year of trying. If you are over 35, see a doctor after six months of trying.