The European Medicines Agency’s safety committee said on Friday (Feb. 11) it was investigating reports of heavy menstrual bleeding and absence of menstruation from women who had received mRNA COVID-19 vaccines from Pfizer and Moderna.
The assessment was in view of reports of menstrual disorders after receiving either of the two vaccines.
Recently, COVID-19 vaccination was linked with a temporary change in menstrual cycle length in a study funded by the U.S. National Institutes of Health, which collected data from nearly 4,000 users of a smartphone app that tracks menstrual cycles.