I found this very difficult to get to grips with at first, ended up using a lot of sticks and none worked. I worked out that was because our house was too cold (no central heating) and following the instructions, I was using early morning samples which had got too cold. Once I realised this i just used fresh samples once I was up and had no problems. It did not agree with the cheaper dip tests as to when the peak time was and the sticks were so expensive that in the end I just used dip tests and am now 23 weeks pregnant :)
The Clearblue Advanced Fertility Monitor is the only monitor that tracks and stores fertility and pregnancy information.
It will tracks the levels of 2 key fertility hormones (estrogen and luteinising hormone) and identifies your fertility cycle when your chances of conception are the biggest (the few days before and when you are ovulating).