COVID-19 Vaccines Can Make Women’s Periods Longer: Study

A study shows that COVID-19 vaccines can make women’s periods last longer, coming months after another paper found the shots are linked to increased menstural bleeding.
In a study published Sept. 27 in the British Medical Journal, researchers documented how COVID-19 vaccines can alter menstrual cycles and how long the impact could last.
A team of researchers led by Dr. Alison Edelman, professor of obstetrics and gynecology at Oregon Health & Science University, analyzed about 20,000 vaccinated and 5,000 unvaccinated women around the world. They obtained their data from a period-tracking app called Natural Cycles.
The team found that any COVID-19 vaccine can extend the menstrual cycle. Women who got the shot experienced approximately a one-day delay in getting their periods, compared with women who did not….