Question: I have read that the vaccine causes infertility. That would be devastating. I guess it interferes with the formation of the placenta. Is this true?
Answer: There is no reason to believe any of the COVID-19 vaccines cause female or male infertility. There’s a rumor that antibodies against the spike protein will also target the syncytin-1 protein. Syncytin-1 is a protein that’s critical to form placentas in pregnant mothers. But antibodies formed against the spike protein won’t target syncytin-1 since they don’t share enough similarities for antibodies to target them both. Nebraska Medicine infectious diseases expert David Brett-Major, MD, MPH, explains this in further detail.
More details at: https://health.unl.edu/covid-19-vaccines