High levels of antioxidants in human semen may lead to lower recovery of sperm motility after being frozen and thawed. Researchers studied 77 normal semen samples to see how the total antioxidant capacity (TAC) of the semen before freezing affected sperm motility recovery. They found that semen with more antioxidants had lower recovery of sperm motility after cryopreservation. Measurements showed that the sperm motility after thawing was linked to the antioxidant levels in the semen before freezing. In simple terms, semen with lots of antioxidants could mean less successful recovery of sperm movement after being frozen and thawed.