Some women report having irregular, heavy, or painful menstrual periods after their COVID-19 vaccine. But experts said even though they heard about the phenomenon, they aren’t sure what could be causing it, and they say it shouldn’t stop anyone from getting the vaccine.
âAre there any reports of funky periods? Yes. Do we have an explanation ready? I don’t think so, “said Dr. Mary Jane Minkin, clinical professor in the Department of Obstetrics, Gynecology, and Reproductive Sciences at Yale University School of Medicine.