No significant decreases seen in any sperm parameters following two doses of an mRNA COVID-19 vaccine<\/p>\n<\/h3>\n
<\/b><\/p>\n
<\/b><\/p>\n
TUESDAY, June 22, 2021 (HealthDay News) — There are no significant decreases in any sperm parameters following administration of an mRNA COVID-19 vaccine, according to a small study of healthy young men published online June 17 in the Journal of the American Medical Association<\/em>.<\/p>\n Daniel C. Gonzalez, from the University of Miami, and colleagues evaluated reproductive toxicity among healthy volunteers receiving mRNA COVID-19 vaccines. Sperm parameters were measured before and 75 days after mRNA vaccine administration in 45 men (median age, 28 years).<\/p>\n The researchers found that baseline sperm concentration and total motile sperm count (TMSC) were 26 million\/mL and 36 million, respectively. The median sperm concentration significantly increased to 30 million\/mL and the median TMSC to 44 million after the second vaccine dose. There were also significant increases noted in semen volume and sperm motility. Following vaccination, no man became azoospermic.<\/p>\n “This is the full life cycle of sperm and 70 days is sufficient time to see if the vaccine impacts semen parameters,” Gonzalez said in a statement. “We measured semen volume, sperm concentration, and the total amount of moving sperm and found there were no declines in any of the parameters as compared to the baseline analysis.”<\/p>\n