Vaccines and Fertility

At the release of the COVID-19 vaccine, there has been much discussion that it may cause infertility. This was based on the fact that a small protein segment of the virus’s outer envelope is similar to a protein involved in normal placental function, primarily implantation, such as when a woman becomes pregnant. Newer information however, indicates that this is not the most likely mechanism for the vaccine’s effect on fertility.
The vaccines from Pfizer and Moderna are RNA vaccines that, when injected, cause your own cells, reportedly muscle cells, to produce a small piece of the viral envelope called a “spike protein”. The body then produces antibodies to that protein so if you become infected, the antibodies attack the virus at the place this “spike protein” sequence exists. The question is would these antibodies also attack the proteins that are produced when a woman becomes pregnant? What is the relevance to anecdotal reports of abnormal uterine bleeding following vaccination?
​Read our findings about how the Covid vaccines affect pregnant women on our blog