Covid-19 vaccines don’t affect male fertility, but catching the virus might: study

Those are the main conclusions of a study funded by the National Institutes of Health, refuting a common myth about the vaccine and sending a warning to men who avoid it.

Researchers at Boston University studied more than 2,000 couples and found no differences in their chances of conception if either partner was vaccinated compared to unvaccinated couples.

But the couples’ chances of conceiving decreased slightly if the male partner had contracted the virus 60 days or less before a menstrual cycle, an indication of diminished male fertility.

One possible reason for that, researchers theorised, is the likelihood coronavirus infection would cause a fever, which has been known to reduce sperm count.