Medicine and Health

Covid-19 vaccination and menstrual cycle length in the Apple Women’s Health Study

E. A. Gibson, H. L. Phan, et al.

This groundbreaking study by Elizabeth A. Gibson and colleagues reveals a small, temporary increase in menstrual cycle length following COVID-19 vaccination, especially with mRNA vaccines. The research challenges common misconceptions by demonstrating that these changes are minor and fleeting, emphasizing the importance of vaccination.

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Playback language: English

Index

Abstract

This study investigated the association between COVID-19 vaccination and menstrual cycle length using data from the Apple Women’s Health Study. Results indicated a small, temporary increase in mean cycle length following vaccination, particularly with mRNA vaccines and the Johnson & Johnson vaccine. This increase was more pronounced when vaccination occurred during the follicular phase. Post-vaccination cycles returned to pre-vaccination lengths. These changes are considered small and temporary and should not deter vaccination.

Publisher

npj Digital Medicine

Published On

Feb 22, 2022

Authors

Elizabeth A. Gibson, Huy L. Phan, Victoria Fruht, Malaika Gabra, Gowtham Asokan, Anne Marie Z. Jukić, Donna D. Baird, Christine L. Curry, Tyler Fischer-Colbrie, Jukka-Pekka Onnela, Michelle A. Williams, Russ Hauser, Brent A. Coull, Shruthi Mahalingaiah

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