The vaccine against Covid-19 does not affect fertility

Health

R. I.

Madrid

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Vaccination against Covid-19 does not affect chances of conceiving a child, according to a study of more than 2,000 couples. Researchers at Boston University (USA) found no difference in the chances of conception if the partner, male or female, had been vaccinated, compared to unvaccinated partners.

However, couples had a slightly lower chance of conception if the male partner had been infected with SARS-CoV-2 in the 60 days before the menstrual cycle, suggesting that Covid-19 could temporarily reduce male fertility.

The study is published in “The American Journal of Epidemiology.”

“The findings provide tranquillity to couples who want to have children that vaccination does not seem to affect fertility,” says Diana Bianchi of the NIH.

The researchers analyzed data from a prospective cohort study of American and Canadian couples trying to conceive without fertility treatment.

The study showed no significant difference in conception rates between vaccinated and unvaccinated couples in which at least one partner had received at least one dose of the vaccine.

Study participants were between the ages of 21 and 45 and completed a questionnaire about their income and education levels, lifestyle, and reproductive and medical history, including whether or not they had been vaccinated against Covid-19 and whether they or their partners had ever had tested positive for SARS-CoV-2. Their male partners, in the same age range, completed a similar questionnaire. The women also completed follow-up questionnaires every eight weeks until they became pregnant or up to 12 months if they did not.

The study showed no significant difference in conception rates between vaccinated and unvaccinated couples in which at least one partner had received at least one dose of the vaccine, regardless of whether they had received one or two doses of a vaccine, the type of vaccine, the time since they were recently vaccinated, whether they were Americans or Canadians, whether they were health care workers or couples with no history of infertility.

In general, a positive test for SARS-CoV-2 infection was not associated with problems conceiving. However, couples in which the male had tested positive within of the 60 days of a menstrual cycle had 18% fewer odds of conceiving in that cycle.

Fever, which is known to reduce the count and sperm motility, is common during SARS-CoV-2 infection and could therefore explain the temporary decrease in fertility that the researchers observed in couples in which the male had a recent infection.

Other possible reasons for a decline in fertility among male partners who recently tested positive could be the inflammation in the testicles and nearby tissues and erectile dysfunction, all common after SARS-CoV-2 infection.

The researchers noted that this short-term decline in male fertility could be prevented. through vaccination.

The study concludes that the results suggest that vaccination against Covid-19 did not have a harmful relationship with fertility and, in fact, vaccination could help avoid the risks posed by SARS-CoV-2 infection. for maternal and fetal health.

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