In a peer-reviewed preprint of a study examining sperm quality after receipt of Pfizer’s COVID-19 shot, researchers found that both sperm concentration and motility were impaired.
The decline was deemed “temporary” for about three months, and researchers therefore determined the shots do not impair fertility, even though it was a small study of only 37 individuals who provided sperm at three sperm banks.
Researchers did not mention that no long-term studies on larger study groups had been done.
SOURCE:
Andrology June 17, 2022