COVID-19 temporarily reduces male fertility, a study found, but the vaccine has no lasting effect on fertility in men or women.
," the prospective study used survey data from participants in the Pregnancy Study Online , an NIH-funded study of women trying to conceive. Specifically, they looked at data on COVID vaccination and infection, as well as fecundability , from 2,126 women in the US and Canada, following them from December 2020 to November 2021. Among other information, the women also provided characteristics about their partners.
Using the self-reported data, researchers calculated that fertility rates among women participants with one vaccine dose were"nearly identical" to those who were unvaccinated, according to a on the study. The same was found among the participants' partners who were men: fecundability was similar between vaccinated and unvaccinated men. Whatimpact fertility among men was COVID-19 infection. Men who tested positive for COVID-19"within 60 days of a given cycle had reduced fertility compared to men who never tested positive" or tested positive at least 60 days before, the press release stated. These COVID-positive men had a temporary, 18 percent drop in fertility.
"Our study shows for the first time that COVID-19 vaccination in either partner is unrelated to fertility among couples trying to conceive through intercourse," added lead author Amelia Wesselink, research assistant professor of epidemiology at BUSPH, in the press release.
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