My question is that with active motility semen 25% pregnancy can be achieved.my reports as ?

Low ....: Low sperm motility at 25% alone already indicates much lower than the "normal" probability to impregnate a proper female - of course, not impossible. Yet, the volume, viscosity, liquefaction time, total sperm count, sperm concentration, sperm maturity, etc. of semen also provides some useful insights into the probability of a man's fertility. If needed or in doubt, ask Doc timely for detail.