Liquefaction <30 min viscosity normal volume 7.5 ph 8 sperm concentration 115 mili/ml a rapid progressive 13.4% b slow prog 30.3% c non prog 12.6% d immotile 43.7% sperm morphology normal 52% head defects 36% neck or mudpiece defects 3% tail defects 7% excess residual cytoplasm 2% wbc 1-3 rbc none immature germ 2-4 others: aggregation:few