There is no evidence that the Pfizer vaccine impacts fertility. Catching COVID-19, however, may impact fertility.
There is no risk that the COVID-19 vaccine will “sterilize” women. Full Fact reports that the risk of infertility is fictitious. Other news outlets report similar findings.
It is true that pregnant and breastfeeding women in the U.K. are not being offered the vaccine. The NHS reports that “there is no evidence [the vaccine is] unsafe if you’re pregnant or breastfeeding. But more evidence is needed before [pregnant and breastfeeding women] can be offered the vaccine.”
What does affect fertility is catching COVID-19. A study published in EClinicalMedicine finds that COVID-19 patients can have lower sperm counts.
The COVID-19 pandemic has given rise to a lot of potentially dangerous misinformation. For reliable advice on COVID-19 including symptoms, prevention and available treatment, please refer to the World Health Organisation or your national healthcare authority.