According to new research, menstrual cycle alterations in women who received COVID-19 vaccines are far more common than previously acknowledged. After being double immunized against COVID, 56% of females experienced modifications in their menstrual cycle.
Over 39,000 18- to 80-year-olds who received two doses of the COVID vaccine were included in the research. The vaccines administered were produced by Pfizer, Moderna, AstraZeneca, Johnson & Johnson, and Novavax.
After receiving the COVID vaccination, 42 percent of study participants reported heavier bleeding in their menstrual cycle.
There were 14% of participants who had excessively lighter menstrual cycles, and 44% who didn’t notice any difference.
“In terms of who was more likely to experience this impact in our sample, people who were Hispanic were more inclined,” stated study author and researcher Katharine Lee. “People who were older in the premenopausal group had an increased chance of seeing heavier bleeding. Women with diseases like endometriosis or fibroids were more prone to see severe bleeding.”
“The researchers pointed out that many of the study participants noticed changes to their menstrual cycles over a week after vaccination, which is past the time when adverse symptom reporting during vaccine trials is closely monitored,” according to Australia’s Nine News.
In the journal’s study, 66 percent of 673 postmenopausal women and 39 percent of those taking gender-affirming hormones reported breakthrough bleeding.
However, there was another warning about vaccinations affecting menstrual cycles during the epidemic.
“There is no evidence linking vaccines to alterations in menstruation yet,” Alice Lu-Culligan and Dr. Randi Hutter Epstein of Yale University School of Medicine wrote in the New York Times in April 2021. “Even if there is a link, one abnormal period isn’t cause for concern.”
The San Francisco Chronicle declared in May 2021 that “claims that vaccines may alter women’s menstrual cycles” are “myths and falsehoods.”
The National Institutes of Health (NIH) announced in January 2022 that COVID-19 vaccines result in “a modest lengthening of the menstrual cycle.”
The Centers for Disease Control and Prevention (CDC) does not consider changes in the menstrual cycle among the “possible adverse effects of a COVID-19 immunization.”
The study of COVID-19 vaccines in clinical trials did not look for changes in the menstrual cycle.