Upgrade your Proov kit to measure a fifth hormone—and unlock the next generation of fertility tracking.

Why the 5th Hormone Matters

When you track 5 key fertility hormones (not just 3 or 4), you get:

• Up to 6 fertile days — 4 more than standard ovulation tests

• Ovulation confirmation up to 2 days sooner than temperature-based methods

• 2X higher chance of catching your LH surge by measuring both forms of LH (intact LH + LH beta)