As per the latest study by the researchers at the University of Miami, The Pfizer and Moderna COVID-19 vaccines pose no threat to male fertility.
Does COVID Vaccine Affect Sperm Count?
According to the senior study author Dr. Ranjith Ramasamy, director of the Reproductive Urology Program at the University of Miami’s Miller School of Medicine. “Because the vaccines contain mRNA and not the live virus, it is unlikely that the vaccine would affect sperm parameters,”
Dr. Ranjith Ramasamy in a university news release also added, “We were the first to demonstrate that the COVID-19 virus, itself, can affect male fertility and be a potential cause for erectile dysfunction,”.
“We are now the first to examine if there is any impact of the COVID-19 vaccine on male fertility potential, which we did not find.”
How Study Conducted?
The study included 45 healthy men between the ages of 18 and 35, who had no fertility problems. Researchers noted that the original clinical trials of the two mRNA vaccines didn’t assess how they might affect fertility.
They delivered a semen sample before getting the first dose of either the Pfizer or Moderna vaccine and another sample about 70 days after their second dose.
Semen analyses were performed by trained andrologists as per World Health Organization guidelines and included semen volume, sperm concentration, sperm motility, and total motile sperm count (TMSC).
“This is the full life cycle of sperm and 70 days is sufficient time to see if the vaccine impacts semen parameters,” said study first author Daniel Gonzalez, a medical student at the Miller School.
He said measurements of semen volume, sperm concentration and moving sperm found no declines from initial levels.
Ramasamy said the findings — which were published online this week in the Journal of the American Medical Association — could go a long way toward reducing vaccine hesitancy.
The study did not assess the single-dose Johnson & Johnson COVID-19 vaccine.
The limitations of the study include the small number of men enrolled, short follow-up, and the lack of a control group.
The researchers also noted that while semen analysis is the foundation of male fertility evaluation, it is an imperfect predictor of fertility potential.