India sits down with her husband Mark to talk about the cycle and their relationship. They also meet a couple - Bill and Amy - who tailor their life based around Amy’s cycle. India and Mark try to decide if this sort of lifestyle is for them.

Credits:
Presented by India Rakusen.
Producer: Ellie Sans.
Assistant Producer: Jorja McAndrew.
Executive Producer: Suzy Grant.
Original music composed and performed by Rebekah Reid.
Sound Design by Charlie Brandon-King.

Special thanks to all contributors and audio diarists.

A Listen production for BBC Radio 4 and BBC Sounds.