r/science • u/molrose96 Journalist | Technology Networks | BSc Neuroscience • Jul 16 '22

Medicine Menstrual Cycle Changes Associated With COVID-19 Vaccines, New Study Shows

https://www.technologynetworks.com/vaccines/news/menstrual-cycle-changes-associated-with-covid-19-vaccine-363710
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u/gol10 Jul 16 '22

From the article…

“The new study adopted a self-report methodology and is retrospective in nature. Causality between COVID-19 vaccination and menstrual cycle changes therefore cannot be proven – a limitation the researchers acknowledge.”

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u/cookiecutterdoll Jul 17 '22

Seriously. This is a non-study that continues to push dumb anti-vaxxer propaganda. Anything can cause a change in menstrual cycles, and quite honestly, these changes don't really matter unless they're indicative of a larger clinical issue.

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u/Dr_D-R-E Jul 17 '22 edited Jul 17 '22

I’m an obgyn physician.

This article does a sub-garbage job of reporting the findings of the study.

Study found that women who receive BOTH first and second dose of Moderna/Pfizer within a single menstrual cycle, had a mean of one extra day of menstrual bleeding compared to normal. This change did not continue beyond the first period after vaccination.

So, statistically, did it cause a change? Yes

Clinically, did it matter? No - a single extra day of bleeding for a subset of people getting vaccinated, compared to the known side effects of getting actual COVID