Covid-19 Vaccines Affected Women’s Menstrual Cycle Sep 27,2022 Covid-19 Vaccine & Women’s Periods Some women reported changes to their periods due to the vaccines. A recent study of 20,000 women confirms this side effect of the vaccine. The changes were temporary and usually within a few days. Other sources with this story are below: CNBC ABC News Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name Email Website Save my name, email, and website in this browser for the next time I comment.