Fetal Heart Rate Monitor
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Moyo is a compact digital fetal monitor used during labor to help healthcare providers make timely, informed decisions by providing quick and accurate feedback on fetal heart rate.


The product is currently sold out and lead times are longer than normal due to the global shortage of electronic components.

Available on backorder

Timely and accurate monitoring

A 9-crystal sensor accurately detects the fetal heart rate within seconds without needing to know the baby’s position. Dual electrodes differentiate the maternal from the fetal heart rate which differs from a regular doppler. Moyo can be used continuously or intermittently.

Better response to abnormalities during labor

Early detection of abnormal Fetal heartrate (FHR) guides decision-making and helps health workers to act quickly. A 30-minute histogram displays the FHR, and audio-visual alarm is activated if abnormal FHR is detected.

Confident health workers and happy mothers

Moyo is lightweight and portable — it can monitor continuously, even while the mother is moving around. It gives a longer heart rate history that informs health workers of the situation and eases the workload without interrupting existing routines.

  • Both intermittent and continuous monitoring
  • 9-crystal sensor for better accuracy
  • Differentiates the maternal and the fetal heart rate
  • 30-minute histogram display of the FHR
  • Audio-visual alarm if abnormal FHR is detected
  • Lightweight and portable, can monitor continuously, even while the mother is moving around
  • Internal rechargeable battery


  • Size: 96 x 96 x 24 mm (W x H x D, without cable and ultrasound transducer)
  • Weight: 300 g (main unit + ultrasound transducer)
  • Operating temperature [°C]: 0 to +40
  • Storage temperature [°C]: -30 to +70
  • CE or Notified Body Number: CE2460
  • Product conformity with standards: IEC 60601-1, ISO 10993
  • Battery:
    • Run time (full charge on fresh battery): >10 hours
    • Internal rechargeable battery, Lithium-ion, 3.7 V, 2600 mAh
    • Lithium battery energy content [Wh]: 8,9
    • Lithium Battery Weight: 45g
    • Are Batteries Required? Yes (rechargeable, embedded in product)
    • Number of Lithium-ion cells: 2
  • Materials:
    • Main body: ABC/PC, stainless steel
    • Ultrasound transducer: ABS
    • Abdominal belt: high elastic polyester, non-latex
    • Neck strap: Polyester, non-latex
  • Ultrasound Transducer:
    • Display range: 30-250 bpm
    • No detectable heart rate or heart rate <30 bpm displayed as "-?-"
    • Accuracy: short term average +/-5% or +/-5 bpm, whichever is greater, in the range of 50 – 150 bpm
  • Maternal HR Electrodes:
    • Display range: 50-250 bpm
    • No detectable heart rate or heart rate <50 bpm displayed as "-?-"
    • Accuracy: short term average +/-5 bpm in the range of 50-200 bpm
  • Reprocessing methods:
    • Spray 70% ethanol on the surface of Moyo, or wet Moyo with a clean cloth dampened with 70% ethanol.
    • Let it stay for a minimum of 10 minutes.
    • Wipe Moyo with a clean cloth dampened with clean water, then let dry.