Cleared Traditional

K231274 - Natural Cycles (FDA 510(k) Clearance)

Class II Obstetrics & Gynecology device cleared through predicate-based substantial equivalence - typically does not require clinical trials.

K231274 · Natural Cycles Nordic AB · Obstetrics & Gynecology device
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Aug 2023
Decision
114d
Days
Class 2
Risk

K231274 is an FDA 510(k) clearance for the Natural Cycles. Classified as Device, Fertility Diagnostic, Contraceptive, Software Application (product code PYT), Class II - Special Controls.

Submitted by Natural Cycles Nordic AB (Stockholm, SE). The FDA issued a Cleared decision on August 24, 2023 after a review of 114 days - within the typical 510(k) review window.

This device falls under the Obstetrics & Gynecology FDA review panel, regulated under 21 CFR 884.5370 - the FDA obstetrics and gynecology device framework. The Traditional 510(k) pathway establishes clearance through substantial equivalence to a legally marketed predicate device, without requiring clinical trial data.

Device pattern: Standard predicate-based submission. Standard predicate reliance. This clearance follows a standard predicate-based equivalence path within the Obstetrics & Gynecology review framework, consistent with the majority of Class II 510(k) submissions.

View all Natural Cycles Nordic AB devices

Submission Details

510(k) Number K231274 FDA.gov
FDA Decision Cleared Substantially Equivalent - Traditional 510(k) (SESE)
Date Received May 02, 2023
Decision Date August 24, 2023
Days to Decision 114 days
Submission Type Traditional
Review Panel Obstetrics & Gynecology (OB)
Summary Summary PDF
Third-party Review No - reviewed directly by FDA
Regulatory Context
Review time vs. panel average
46d faster than avg
Panel avg: 160d · This submission: 114d
Pathway characteristics
Predicate-based equivalence. No clinical trials required.

Device Classification

Product Code PYT Device, Fertility Diagnostic, Contraceptive, Software Application
Device Class Class 2 - Special Controls
CFR Regulation 21 CFR 884.5370
Definition Designed To Monitor And Provide Fertility Information To Prevent Pregnancy (contraception).
What this classification means

Class II devices require demonstration of substantial equivalence to a legally marketed predicate device. This pathway does not require clinical trials - it relies on engineering equivalence and performance data. Most Obstetrics & Gynecology devices follow this clearance model.