Minimal semen parameters recommended for sperm donors

Volume	>2 mL
Sperm motility	>50% moving actively in a purposeful direction
Sperm concentration	>50×10⁶ motile sperm/mL
Sperm morphology	Normal range
Cryosurvival	>50% of initial motility

Modified from: American Society of Reproductive Medicine. Fertil Steril 2002; 77:S15.

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