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The KNOWHEN saliva ovulation test is based on scientific research showing that rising estrogen levels before ovulation create visible ferning patterns in dried saliva. By observing these patterns under a small microscope, women can identify their most fertile days naturally without relying on urine based testing. This hormone driven method provides a reusable, convenient, and clinically supported way to monitor fertility cycles with greater awareness and confidence.
User Website : https://knowhen.com/science/
