Cleared Special

K173431 - Towako Transmyometrial Embryo Transfer Set (FDA 510(k) Clearance)

Class II Obstetrics & Gynecology device cleared through the Special 510(k) pathway - typically does not require clinical trials.

K173431 · William A. Cook Australia Pty. , Ltd. · Obstetrics & Gynecology device
Download Printable Device Report (PDF)
Optimized for regulatory review, auditing and printing
May 2018
Decision
197d
Days
Class 2
Risk

K173431 is an FDA 510(k) clearance for the Towako Transmyometrial Embryo Transfer Set. Classified as Catheter, Assisted Reproduction (product code MQF), Class II - Special Controls.

Submitted by William A. Cook Australia Pty. , Ltd. (Eight Mile Plains, AU). The FDA issued a Cleared decision on May 18, 2018 after a review of 197 days - an extended review cycle.

This device falls under the Obstetrics & Gynecology FDA review panel, regulated under 21 CFR 884.6110 - the FDA obstetrics and gynecology device framework. As a Special 510(k), this submission covers a manufacturer modification to an existing cleared device rather than a new device introduction.

Device pattern: Iterative device modification. Standard predicate reliance. This Special 510(k) clearance confirms that the manufacturer's modifications remained within the established regulatory envelope of the original cleared device.

View all William A. Cook Australia Pty. , Ltd. devices

Submission Details

510(k) Number K173431 FDA.gov
FDA Decision Cleared Substantially Equivalent - Traditional 510(k) (SESE)
Date Received November 02, 2017
Decision Date May 18, 2018
Days to Decision 197 days
Submission Type Special
Review Panel Obstetrics & Gynecology (OB)
Summary Summary PDF
Third-party Review No - reviewed directly by FDA
Regulatory Context
Review time vs. panel average
37d slower than avg
Panel avg: 160d · This submission: 197d
Pathway characteristics
Modification to existing cleared device.

Device Classification

Product Code MQF Catheter, Assisted Reproduction
Device Class Class 2 - Special Controls
CFR Regulation 21 CFR 884.6110
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.

Regulatory Peers - MQF Catheter, Assisted Reproduction

All 52
Devices cleared under the same product code (MQF) and FDA review panel - the closest regulatory comparables to K173431.
Minvitro Embryo Transfer Catheters (ETCA23175, ETCA23175-C, ETCB20175, ETCB20175-C, ETCB20175-ET, ETCB20175-ET-C)
K253354 · Guangzhou Hehong Biotech Co., Ltd. · Feb 2026
Embryo Transfer Catheter (ETC) Assortment: EmbryoCath Embryo Transfer Catheter - Pre-curved 230 mm (REF 17500)
K243373 · Vitrolife Sweden AB · Jul 2025
VitaVitro Embryo Transfer Catheter (Models ET-S, ET-SI, ET-A, ET-I, ET-IH)
K240307 · Shenzhen Vitavitro Biotech Co., Ltd. · Aug 2024
FemaSeed Intratubal Insemination
K231730 · Femasys, Inc. · Sep 2023
Daylily Single Use Sterile Embryo Transfer Catheter
K220010 · Shanghai Horizon Medical Technology Co., Ltd. · Dec 2022
Allwin Embryo Transfer Catheters (ETC), Allwin ETC Stylets and Soft Obturators
K200248 · Allwin Medical Devices, Inc. · Jul 2020