New Study of 9,500 Women Finds COVID-19 Jab Could Lead to Heavier Menstrual Bleeding

A nurse administers a COVID-19 vaccine booster to a person at a hospital in Hines, Ill., on April 1, 2022. Scott Olson/Getty Images

Women vaccinated for COVID-19 have a slightly higher risk of heavier menstrual bleeding, according to a new study.

According to the study that examined 7,401 vaccinated and 2,154 unvaccinated women, researchers found an increase in the amount of bleeding for 40 out of 1,000 individuals after one dose of the jab.