Which of the following method is based on the absorption of electromagnetic radiation in the visible, ultraviolet and infrared ranges?

Fetal monitoring devices are used to listen to or record a fetus's heartbeat through the mother's abdomen.  The most common type of fetal monitoring is external electronic fetal monitoring (EFM).  Here are some types of fetal monitoring instruments: Doppler ultrasound device: A handheld electronic device that's often used during prenatal visits and sometimes during labor. Fetoscope: A type of stethoscope that's the most basic type of external monitor. Electronic fetal monitoring: A procedure that uses instruments to continuously record the fetus's heartbeat and the mother's uterine... Show more

Fetal monitoring devices are used to listen to or record a fetus's heartbeat through the mother's abdomen. 
The most common type of fetal monitoring is external electronic fetal monitoring (EFM). 

Here are some types of fetal monitoring instruments:
Doppler ultrasound device: A handheld electronic device that's often used during prenatal visits and sometimes during labor.
Fetoscope: A type of stethoscope that's the most basic type of external monitor.
Electronic fetal monitoring: A procedure that uses instruments to continuously record the fetus's heartbeat and the mother's uterine contractions during labor.
Novii™ Wireless Patch System: A maternal/fetal monitor that noninvasively measures and displays fetal heart rate and maternal heart rate. 
 

Topics include: Cardiotocograph, Foetal Heart Rate Method, Monitoring Labour Activity, & Recording System.

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