Online survey identifies link between menstrual disorders and covid vaccine

About half of women surveyed by US researchers reported unusual but transient bleeding. The European Medicines Agency continues to investigate these rare side effects.


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SAccording to a large American survey, conducted online among more than 39,000 people currently or formerly menstruating, almost half (42%) reported heavier bleeding after being vaccinated against covid – while around the same proportion (44 %) reported no change, with 14% reporting lighter periods. Other respondents who were usually not menstruating (39% of people on gender-affirming hormones, 71% of women on hormonal contraception, or 66% of postmenopausal women) also experienced unusual bleeding.




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