What are the domestic and international EMC (electromagnetic compatibility) standards for fetal monitors?

Fetal monitors are used to monitor fetal heart rate and uterine contraction pressure and must meet GB 9706.1, YY 0505 (domestic), and IEC 60601-1-2 (international) EMC standards. They acquire signals through an ultrasonic Doppler probe and pressure sensor, and are susceptible to environmental noise (e.g., power supply noise, spatial radiation). Standards require that the equipment accurately capture fetal heart signals in maternity wards or delivery rooms, avoiding false counting or signal loss due to interference, while also ensuring that the equipment itself does not interfere with other monitoring devices. Wireless fetal heart rate monitoring equipment must also comply with specific wireless transmission standards.