A Method for Controlled Sound Stimulation of the Human Fetus

Abstract
To determine the fetal heart rate response to sound stimulation, a bone-conductor vibrator was used in direct contact with the uterus. This method implies a short pathway between the sound source and the fetal ear and makes it possible to apply a controlled sound stimulus to the fetus. The heart rate response is found to depend on the intensity of the sound and on the prestimulation heart rate.

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