Ovulation Tests detect luteinising hormone (LH) in your urine. The level of this hormone rises or ‘surges’ 24-36 hours before you ovulate. So, by detecting your LH surge using Clearblue Ovulation Tests, you can predict the two days each cycle when you are most fertile and therefore most likely to get pregnant; the day before ovulation and the day of ovulation.

Clearblue Ovulation Tests are 99% accurate and take 3 minutes to give your result.