Shana Clauson was in line to get her first dose of the Moderna shot in March when she saw menstruators on social media discussing how their periods had been altered - earlier, heavier and more painful than usual - after they got their coronavirus vaccinations.

https://www.yahoo.com/news/women-sai...173059072.html

by Julianne McShane
The Washington Post

Clauson, a 45-year-old who lives in Hudson, Wis., went ahead and got the shot - and, a few days later, also got an earlier and heavier period than she was used to. A few weeks later, in early April, she told The Washington Post that she was frustrated with the lack of research on whether the vaccines impacted menstrual cycles.