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Comment
. 2023 Jun 2;192(6):849-850.
doi: 10.1093/aje/kwad039.

Does COVID-19 Vaccination Disturb Menstrual Cycling?

Comment

Does COVID-19 Vaccination Disturb Menstrual Cycling?

Clarice R Weinberg. Am J Epidemiol. .

Abstract

Coronavirus disease 2019 (COVID-19) vaccines have been reported to have a short-term effect on the menstrual cycle, delaying the onset of the next menses. However, the analytical methods that have been used to study this are subject to a statistical phenomenon called "length-biased sampling" that calls the results into question. Those data are important and should be reanalyzed in an unbiased way.

Keywords: COVID-19; length bias; vaccination.

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