Impact of coronavirus disease 2019 (COVID-19) vaccination on menstrual bleeding quantity: An observational cohort study.
Blair G DarneyEmily R BonifaceAgathe Van LamsweerdeLeo HanKristen A MattesonSharon Tracey CameronVictoria MaleJuan AcunaEleonora BenharJack T PearsonAlison EdelmanPublished in: BJOG : an international journal of obstetrics and gynaecology (2023)
A small increase in the probability of greater total bleeding quantity occurred following the first COVID-19 vaccine dose, which resolved in the cycle after the post-vaccination cycle. The total number of heavy bleeding days did not differ by vaccination status. Our findings can reassure the public that any changes are small and transient.