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Fetal Doppler detects fetal heart rate externally utilizing the principle of Doppler shift of an ultrasound that the frequency shift of the reflected signal is1) Lie down in a comfortable position with your shirt up and pants down. · 2) Apply gel to your lower belly. · 3) Take the probe of your doppler and slowly work This user manual is written and compiled in accordance with the council directive. MDD93/42/EEC for medical devices and harmonized standards. In case of