Menstrual health has long been overlooked by the scientific research community, and there are many myths, theories, beliefs and social stigmas which lack conclusive evidence. One of these is the idea of cycles lining up, or “syncing.”
After our research partner Dr. Alexandra Alvergne from the University of Oxford wrote about the history of the cycle syncing theory, we asked Clue users if they thought their cycles had been syncing with another person (who also uses Clue).
Over 1,500 people replied, and told us what type of relationship they’re in (friends, siblings, parent/child, partners, roommates or colleagues), if they live together and if they’re on hormonal birth control.
