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Risk for Heavy Menstrual Bleeding Clarified

Cases of menstrual disorders, particularly unusually heavy menstrual bleeding, have been reported following RNA vaccination against COVID-19.

The study included all women aged 15-50 years who were diagnosed with heavy menstrual bleeding in the hospital between May 12, 2021, and August 31, 2022. Participants were identified in the National Health Data System, and the study population totaled 4610 women.

Compared with control women, those hospitalized for heavy menstrual bleeding were more likely to have received their last dose of mRNA vaccine (Comirnaty or Spikevax) in the previous 1-3 months. This association was observed for vaccination doses (odds ratio [OR], 1.20), indicating a 20% increased risk, but it was not found for booster doses (OR, 1.07).

RNA Vaccines: Risk for Heavy Menstrual Bleeding Clarified – Medscape – February 07, 2024.

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