No! Menstrual discs, including Flex Disc, Flex Plant+ Disc, and Flex Reusable Disc, will not cause period blood to go back up into the uterus—even during sex, intense workouts, yoga, swimming, etc. Period products have not been associated with retrograde menstruation.
If you have any concerns about retrograde menstruation more generally or if you’re experiencing any pelvic pain or unusual period symptoms, reach out to a healthcare provider or Ob/Gyn.
Have more questions? We've got answers! Feel free to reach out to us at hello@flexfits.com.