Top vendors for Fetal Monitors, compared

Six vendors in the fetal monitoring space — ranging from full CTG systems and handheld Dopplers to replacement accessories and fertility-adjacent digital tools.

The vendors listed here occupy very different corners of "fetal monitoring," so the first task is matching each one to the right use case. Bionet America, Inc. is the only full CTG fetal monitor manufacturer in this group — relevant if your L&D or antepartum unit is buying new monitoring equipment. Koven Technology, Inc. covers handheld and tabletop fetal Dopplers for prenatal auscultation in clinic settings, backed by over 40 years of Koven/Hadeco product history in North America. Cables and Sensors, LLC doesn't sell monitors at all — it supplies replacement fetal monitoring cables and transducer accessories compatible with major OEM brands, which matters if your biomed team is managing an existing fleet.

The remaining three vendors sit further from core fetal monitoring. INNOVAMED SPHERE INC makes the NICaS non-invasive hemodynamic system — a maternal monitoring tool, not fetal surveillance. Planer Limited, now operating as Nexpring Health, is an IVF and assisted reproductive technology company with no fetal monitoring products. Oova, Inc. makes a smartphone-linked urine hormone test for fertility and perimenopause tracking. Know which segment you're buying in before you read further.

At a glance

Vendor	Role	Product focus	HQ	Founded
Bionet America, Inc.	Manufacturer & NA distributor	CTG fetal monitors, ECG, multiparameter monitors	CA, US	2002
Cables and Sensors, LLC	Accessories distributor	Fetal monitoring cables & OEM-compatible accessories	FL, US	2012
INNOVAMED SPHERE INC	Manufacturer	Non-invasive maternal hemodynamic monitoring (NICaS)	Israel	—
Koven Technology, Inc.	Exclusive NA distributor	Fetal Dopplers, vascular Dopplers	MO, US	1981
Planer Limited	Manufacturer	ART/IVF lab equipment & consumables	MA, US	1986
Oova, Inc.	Digital health diagnostics	At-home hormone tracking (LH, E3G, PdG)	NY, US	2017

How they compare

CTG monitors vs. fetal Dopplers vs. accessories

If your department needs cardiotocography — continuous fetal heart rate and uterine contraction recording — Bionet America, Inc. is the only vendor in this group that manufactures those systems. The company serves the US and Canada and positions its fetal monitors as affordable alternatives to the larger OEM brands. Specific model names, FDA 510(k) clearance numbers, and list pricing are not publicly verifiable from available vendor data; request documentation directly. Ask specifically about EMR integration and whether the unit meets IEC 60601-1 electrical safety standards before issuing a PO.

Koven Technology, Inc. occupies a narrower, clearly defined niche: handheld and tabletop fetal Dopplers for obstetric office use. These are point-of-care auscultation devices — used to confirm fetal heart tones during prenatal visits, not for continuous intrapartum monitoring. Koven is the exclusive North American distributor of the Koven/Hadeco line, a product history stretching back to 1981. For an OB/GYN practice, midwifery clinic, or family medicine office, Koven belongs on the shortlist. For a hospital L&D department buying CTG monitors, it does not.

Cables and Sensors, LLC targets a procurement problem that frequently gets under-managed: accessory costs on existing equipment. The company supplies replacement fetal monitoring cables and transducers compatible with Philips, GE Marquette, Spacelabs, Nihon Kohden, and other major platforms — marketed as cost-effective alternatives to OEM pricing. With over 10,000 healthcare facility customers on record, the scale suggests reliable availability. This is a vendor your biomed team should evaluate at contract renewal time, not when buying new hardware.

Adjacent vendors — what they actually do

INNOVAMED SPHERE INC develops the NICaS whole-body bioimpedance system, which measures maternal cardiac output, stroke volume, and systemic vascular resistance non-invasively. In high-risk obstetrics — preeclampsia, peripartum cardiomyopathy, cardiac disease in pregnancy — maternal hemodynamic monitoring is a genuine clinical need, and NICaS carries peer-reviewed validation. But it monitors the mother's cardiovascular status, not the fetus. Procuring it as a "fetal monitor" would be a category error; evaluate it as a maternal monitoring adjunct if your MFM or critical care obstetrics unit has a gap there.

Planer Limited, trading as Nexpring Health from 2025, is an ART platform company assembled from Hamilton Thorne, Cook Medical's reproductive health division, and Fujifilm Irvine Scientific's media business. Its product set covers IVF incubators, laser systems, and embryo culture media. Oova, Inc. makes a urine-based hormone strip with AI-powered smartphone analysis, tracking LH, estrogen metabolite (E3G), and progesterone metabolite (PdG) for fertility and perimenopause management. Both companies are relevant to reproductive health procurement — neither belongs in a fetal monitor evaluation.

How to choose

Your use case drives the vendor decision here more than any feature comparison does.

• Hospital L&D or antepartum unit buying CTG monitors: Evaluate Bionet America, Inc.. Request IEC 60601-1 compliance documentation, FDA 510(k) clearance numbers, and integration specs for your EMR before shortlisting.
• OB/GYN clinic, midwifery practice, or family medicine office needing prenatal Doppler auscultation: Koven Technology, Inc. is the relevant vendor. Compare handheld vs. tabletop configurations based on patient volume and exam room setup.
• Biomed or supply chain team managing an existing fetal monitor fleet: Assess Cables and Sensors, LLC for OEM-compatible replacement accessories. Run a unit-cost comparison against your current OEM accessory contracts.
• MFM or high-risk obstetrics unit adding maternal hemodynamic monitoring: INNOVAMED SPHERE INC is the only vendor here with a clinically validated hemodynamic tool — evaluate it as a maternal monitoring adjunct, and ask for peer-reviewed outcome data before purchasing.