Product Details 1. Accurate - over 99% accurate in detecting the LH surge in urine. 2. Reliable - uses innovation based on established technology. 3. Unmistakably clear - digital results "J" (positive LH surge) or "O" (no LH surge) for greater accuracy in consumers' hands. 4. Adaptive - the only ovulation test brand that can adapt to a woman's individual hormone levels every time she tests. 5. Simple to use - convenient and easy to interpret. 6. Trustworthy from Clearblue, the worlds number one selling brand in home pregnancy and fertility tests