Is pregnancey possible with 50ml/mL sperm count and 50% motility?

If your man has a low sperm count, it is best to have every other day during your fertile period phase, but especially on your peak day (last day of EWCM). It is possible - but what you would have to do is be a "charting fool" and check your BBTs, CM and CP throughout your cycle to see when you are most likely fertile and his weaker swimmers can hit the target.