Users tend to share a lot of person data with their menstrual apps.
Most women who tried them said they'd like to continue using them.
March is Endometriosis Awareness Month
Oxford researchers worked with the period-tracking app CLUE.
"The way we view menstrual health products is no different than toilet paper or paper towel."
Periods are a fact of life, and the code of silence that surrounds them carries a heavier toll than you might expect.