I have read that the vaccine causes infertility. That would be devastating. I guess it interferes with the formation of the placenta.
Answer from infectious diseases expert David Brett-Major, MD, MPH
The COVID-19 mRNA vaccines now have been in tens of thousands of people and infertility has not been a problem for men or women.
Twenty-three women became pregnant after participating in Pfizer's mRNA vaccine clinical trial. Pfizer reported one poor pregnancy outcome in someone in the control/placebo group – meaning they had not received the vaccine.
There is a rumor that antibodies against the spike protein will also target a protein in the placenta of pregnant mothers, syncytin-1. There is no data suggesting that these antibodies will affect syncytin-1, as they are different proteins.