Without getting tooooooo graffic, you have to pop 2, yes 2 fingers in side and try to reach your cervix (little nobbly thing sometimes high sometimes low) wipe one finger around the back of it and pull both fingers out together, then you will get to see what cm you have. If it's really creamy looking like thrush dont panic, it's coz you have a higher dose than normal in your knickers type amount. Gives the best results this way girls. I didnt notice any different cm until I done it this way either and reading VIP on FF tells you to do it this way. Happy feeling lol..