Identify your fertile days with 99% accuracy
The Clearblue & Natural Cycles Birth Control Ovulation Test Refill Pack determines fertile days with over 99% accuracy. Ovulation tests measure luteinizing hormone (LH) and identifies the most fertile days of your cycle. These tests feature a unique surge icon, that appears when an LH surge is detected.
*For a limited time only, add 4 packs to your cart and get 15% off! Discount will be applied during checkout.
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