Scientists have long considered that the world’s most common sexually transmitted infection, human papillomavirus, or HPV, may be a driver of infertility.
The high-risk strains of human papillomavirus that are linked to cancer appear to also pose a threat to sperm quality.
Thirty-nine, or 19%, of the men tested positive for HPV. Researchers were able to identify 20 men among them who had high-risk strains and seven men with low-risk HPV. There was also evidence that the sperm of the men with high-risk HPV were sustaining damage from what’s known as oxidative stress. This could explain why these men had a higher level of dead sperm compared with those who didn’t have the virus.
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