Menstrual Cycle Length Changes Following Vaccination Against Influenza Alone or With COVID-19.

ABSTRACT:

Importance

Multiple studies have identified an association between COVID-19 vaccination and menstrual disturbances. Data on whether menstrual health is impacted by other vaccines are needed to counsel individuals about what to expect and to address vaccine hesitancy.

Objective

To assess the association of changes in length of the menstrual cycle with influenza vaccination, with or without concurrent receipt of a COVID-19 vaccine.

Design, setting, and participants

This global retrospective cohort study prospectively collected menstrual cycle data from April 25, 2023, to February 27, 2024 (4-5 cycles per individual), among international English-speaking users of a digital birth control application. Participants included individuals aged 18 to 45 years, not using hormona

SUBMITTER: Boniface ER 

PROVIDER: S-EPMC12042056 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature