Covid-19 vaccines don’t affect male fertility, but catching the virus might: study
Getting vaccinated against Covid-19 won’t affect a couple’s chances of getting pregnant, but contracting the coronavirus could impair male fertility.
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.
Among the males in the study who tested positive more than 60 days before the cycle, conception rates were the same as males who had not been infected. But couples in which the male was infected within that 60-day window were 18 percent less likely to conceive in that cycle.
“The findings provide reassurance that vaccination for couples seeking pregnancy does not appear to impair fertility,” said Diana Bianchi, director of NIH’s Eunice Kennedy Shriver National Institute of Child Health and Human Development, which funded the study.
Misinformation about the impact of Covid-19 vaccines on pregnancy and fertility has been so prevalent that some doctors have proactively dispelled the myth with their patients of reproductive age.
In September 2021, the US Centres for Disease Control and Prevention urgently exhorted those who were pregnant or planning to conceive to get vaccinated, after the pandemic’ s highest number of Covid-19 deaths among pregnant people was recorded the month before.
来源：South China Morning Post