There is no evidence to support this claim and COVID-19 vaccines have not been associated with adverse outcomes in pregnancy beyond the background rate. Menstrual changes likely stem from immunologic responses to the vaccine and are temporary.

I am hearing again and again about dysmennorhea and "heavy flow" as a vaccine side effect. The thing is, "heavy flow" can actually be occult spontaneous abortion. This adverse event seems to be totally overlooked by CDC and FDA. I am concerned. This relates to reproduction.