With 2.8 billion people fully vaccinated globally, we would expect to see a significant and large increase in reported male infertility in 2021 – except we haven’t seen this reported. In 2017, about seven in 1000 men of reproductive age were affected by male infertility. “Because the vaccines contain mRNA and not the live virus, it is unlikely that the vaccine would affect sperm parameters,” the authors point out in the paper. In fact, it found that semen volume, sperm count and sperm motility all significantly increased.Įight of the men had low sperm count prior to vaccination, but this increased to normal levels after. The volunteers came from a pool of men receiving IVF services, and 32% of the participants already had ineffective sperm.Īnother study published in JAMA quantified sperm volume of 45 men before and after two doses of an mRNA vaccine (either Pfizer or Moderna) and saw no decrease in sperm count 70 days – the life cycle of a sperm – following the second dose. One preprint study, submitted in May 2021, found no difference in sperm characteristics of 43 men before and after vaccination with Pfizer. In fact, there is no evidence that any vaccine at all causes infertility in either males or females. ![]() Do vaccines cause infertility in males?Ĭurrently there is no evidence that sperm count, semen volume and sperm motility are negatively affected by a vaccine. ![]() ![]() This is not the case – there is no established link between COVID vaccines and male fertility, though falling ill with COVID-19 may pose a risk of sexual dysfunction. Vaccines do have side effects, but there are some social-media users peddling myths that COVID-19 vaccines cause male infertility and sexual dysfunction.
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