I tried clearblue advance sticks with 3 different faces to show you results if you have LG surge during ovulation time, but the system didn't work. I tested it with the clearblue (pink) stick on the same day and it said I didn't have LG surge when the clearblue advance one still have a flashing smiling face indicating I have high LG surge on the result. These clearblue advance sticks are too expensive not to work. Please don't waste your money and time on it. I am so sad it wasted my time on trying this month. Good Luck everyone!