Detection of antibodies to SARS-CoV-2 after vaccination in seminal plasma and their association to sperm parameters.

There is a public concern that COVID-19 vaccination and SARS-CoV-2 antibodies (Abs) negatively affect male fertility. However, the evidence for the presence of SARS-CoV-2 Abs in seminal plasma (SP) is lacking. We examined whether Abs were detectable in SP after COVID-19 vaccination in 86 men using a direct Ab measurement and by quantification of their neutralizing activity. The results show the presence of SARS-CoV-2 Abs in SP, with a strong correlation to the serum Abs, increasing with the number of vaccinations. Furthermore, the Ab titers are correlating with the neutralization activity. The SARS-CoV-2 vaccination parameters showed no association with the markers of sperm quality. In conclusion, this study indicates substantial levels of Abs in SP after COVID-19 vaccination that correlate with serum Ab titers but do not associate with sperm quality.