weehingthong

https://t.co/sHz4RpSzC8 pic.twitter.com/YRraWSchc5

— KittyPooh (@KittyPo80176717) August 9, 2022

1. In early 2021, reports of menstrual cycle changes post-COVID-19 vaccination began to emerge across formal channels, including the UK’s Yellow Card Scheme, and social media.

— KittyPooh (@KittyPo80176717) August 9, 2022

3. Clancy and colleagues used their survey to ask individuals about their experiences after receiving a COVID-19 vaccination. “We recruited online, mostly through Twitter but also Facebook and Instagram. The survey really took off in what is called ‘snowball sampling’…

— KittyPooh (@KittyPo80176717) August 9, 2022

5. The survey results identified that 42.1% of menstruating individuals had experienced a heavier menstrual flow following vaccination, with some reporting that this occurred within the first 7 days, while others experienced changes 8–14 days afterwards.

— KittyPooh (@KittyPo80176717) August 9, 2022

7. “Our key finding is that increased bleeding (heavier among menstruating people, and breakthrough bleeding among non-menstruating people) is real, mechanistically plausible and experienced by a significant number of people,” says Clancy.

— KittyPooh (@KittyPo80176717) August 9, 2022

9. Vaccines induce an immune response, generating the production of antibodies. This…can lead to changes in hemostasis and inflammatory pathways in the body. It’s possible that such effects can impact the complex chemical interactions that regulate menstrual cycles.

— KittyPooh (@KittyPo80176717) August 9, 2022

11. “The endometrium (lining of the uterus) is needing to bleed and clot appropriately as it repairs and heals. A disruption of immune function or inflammation is going to disrupt those processes in at least some people.”

— KittyPooh (@KittyPo80176717) August 9, 2022