Clearblue Digital Ovulation Test (7 tests)

Clearblue Digital Ovulation Test (7 Tests). Clearblue Digital Ovulation Test Tells you the best 2 da

Clearblue Digital Ovulation Test (7 Tests). Clearblue Digital Ovulation Test Tells you the best 2 days to conceive naturally. 7 Tests. 99 Accurate, Easy-read results. Clearblue Digital Ovulation Test works by detecting an increase (surge) in the hormone called Luteinising Hormone (LH) in your urine. This LH surge occurs prior to the release of an egg from your ovaries - a process known as ovulation. You are at your most fertile on the day your LH surge is detected and the day afte

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