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7. Does the Pfizer-BioNTech COVID-19 Vaccine cause infertility?
It has been suggested that COVID-19 vaccines will cause infertility because of a shared amino acid sequence in the spike protein of SARS-CoV-2 and a placental protein. Although the SARS-CoV-2 spike protein shares an amino acid sequence with a placental protein, the two proteins are immunologically different and distinct.5
In an animal study in which the Pfizer-BioNTech COVID-19 Vaccine was administered prior to and during gestation, no vaccine-related adverse effects on female fertility, fetal development, or postnatal development were reported.1 If you are pregnant, or planning to become pregnant, discuss your options with your healthcare provider.