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FDA Clears Natural Cycles' AI Fertility Algorithm, 98% Effective

7/29/2026

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Summary

Story summary

FDA cleared Natural Cycles' next-generation NC° Fertility Algorithm, the company's sixth clearance.
The AI model uses machine learning trained on tens of millions of fertility data points.
FDA reviewers said it maintains 98 % effectiveness with perfect use and 93 % with typical use.
The update adds more “Green Days,” extending non-fertile periods and improving accuracy for irregular cycles and low-quality biomarker data.

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Story summary

FDA cleared Natural Cycles' next-generation NC° Fertility Algorithm, the company's sixth clearance.
The AI model uses machine learning trained on tens of millions of fertility data points.
FDA reviewers said it maintains 98 % effectiveness with perfect use and 93 % with typical use.
The update adds more “Green Days,” extending non-fertile periods and improving accuracy for irregular cycles and low-quality biomarker data.