I didn’t really find anything convincing about sterility and the Pfizer/Moderna vaccines. Appears to be a debunked concern about it potentially causing the body to make antibodies against syncytin-1, which would in turn compromise the placenta? I don’t know. Fortunately, I don’t have to be concerned with my placenta...
You can look at this this way too. The China virus and the vaccine have some similarities. Both were created in a lab, are used to manipulate, remain highly mysterious, and have the potential to cause people to have very different reactions. Meanwhile, what we do know so far about the long term consequences of China virus infection is that some people are living with a chronic (usually lung) illness after recovering from the acute illness. It’s actually estimated that 10% of people who have been infected with the virus have lung tissue damage for up to a year, and in some cases permanent scarring.
On the other hand, the long term impact (if any) of the vaccine on people’s health is yet to be determined. I wouldn’t say that I fully trust the vaccine or the virus, but I am still comfortable with my choice. For all I know, I have already had the China virus and the vaccine.