---
title: "What is Vibroacoustic Stimulation?"
url: https://alsuprun.com/blog/vibroacoustic/what-is-vibroacoustic-stimulation-3/
author: "Editorial"
date: 2026-10-14T16:22:44+00:00
categories: ["vibroacoustic"]
tags: []
---

# What is Vibroacoustic Stimulation?

Fetal acoustic stimulation is a non-invasive technique that has been shown to improve the efficiency of antepartum fetal heart rate testing by shortening test time. It also reduces the number of false positive tests and has been linked to favorable neonatal outcomes.

 Randomised trials comparing fetal [vibroacoustic stimulation](https://alsuprun.com/) versus mock stimulation are needed. These trials need to examine important maternal and fetal outcomes.

 

## What is Vibroacoustic Stimulation?

 [Vibroacoustic stimulation](https://alsuprun.com/) is a non-invasive technique that involves stimulating the fetus with low-frequency sounds and music within the range of human hearing. The aim of the technique is to elicit a behavioral response in the fetus which can be used to assess fetal health. The fetus’s response to the sound can be observed by doctors during an ultrasound scan. The method has been in use for several decades and is considered safe for both mother and fetus.

 [![Rejuvenate your whole body & balance your health without medications - now remotely!](https://alsuprun.com/blog/wp-content/uploads/BioresonanceTopAd.png)](https://www.bioresonance.rent) Despite its popularity, the technique has not been validated by randomized controlled trials. However, studies have shown that fetal vibration stimulates a behavioral response in 94% of fetuses and is associated with an increase in the amplitude and frequency of the fetal heart rate. Moreover, the technique is inexpensive and easy to use. It is also an effective alternative to invasive tests such as fetal scalp blood sampling which require dilation of the cervix and access to the fetus’s presenting part.

 A recent meta-analysis of 11 studies with a total of 6,680 women found that [vibroacoustic stimulation](https://alsuprun.com/) reduces the number of non-reassuring cardiotocographic (CTG) results in labour and has no adverse maternal or neonatal outcomes. The authors recommend the use of this approach in conjunction with other fetal testing.

 The Cochrane Pregnancy and Childbirth Group has conducted an update of this review and two additional trials have been included. This review was independently assessed by two experts and is based on high quality evidence. This evidence includes two trials comparing fetal [vibroacoustic stimulation](https://alsuprun.com/) with mock or no stimulation. Mock stimulation is achieved by placing the [vibroacoustic](https://alsuprun.com/) device against the maternal abdomen in the same way as when the stimulus is activated but without activating the stimulus. This allows a blinded assessment of the effect of the intervention on stress as measured subjectively using a questionnaire and objectively by measuring physiological changes in the fetus’s heart rate.

 [![](https://alsuprun.com/blog/wp-content/uploads/ForeverYoungYouWannaBe.png)](https://alsuprun.com/services.html#Contact) In addition to reducing the incidence of non-reactive fetal cardiotocography tests, the acoustic stimulation has been found to decrease the duration of the test by provoking more fetal movements. Thus, fetal [vibroacoustic](https://alsuprun.com/) simulation can significantly improve the efficiency of antepartum fetal heart rate testing by shortening the test time and freeing up perinatal resources.

 

## How is Vibroacoustic Stimulation done?

 The idea behind fetal [vibroacoustic stimulation](https://alsuprun.com/) is that if a baby is healthy and moving around as it should be, its heart rate will increase after it feels the vibration from sound. This can be detected by a simple machine that is attached to the woman’s stomach. The vibrations are transmitted from the machine into the mother’s womb and then detected by the ultrasound device that is connected to the woman’s abdomen. The fetal heart rate acceleration or transient tachycardia is then recorded on the ultrasound screen. This test can also be used to see if there are any problems with the baby.

 It is important to be able to distinguish babies that are having trouble from those who are not. Changes in the baby’s heart rate pattern during labour are a good indication that a fetus is having difficulty, but these changes may not always be easy to detect. Many different tests are done to try and identify which babies need help, but most of these are invasive and not widely available. Fetal [vibroacoustic stimulation](https://alsuprun.com/) is a simple, non-invasive and inexpensive way to evaluate the baby’s well-being.

 There are several studies that show the success of fetal [vibroacoustic](https://alsuprun.com/) stimuli in helping to assess the baby’s well-being. However, some of these studies have found that the results are not always reliable. One possible reason for this is that the intensity of the [vibroacoustic](https://alsuprun.com/) stimulus is not consistent across studies. Some studies use a three-second stimulus, while others use a five-second stimulus. The type of vibration used is also a factor, with some studies using a mechanical artificial larynx while others use an electronic device.

 Another problem is that the fetus’s response to [vibroacoustic stimulation](https://alsuprun.com/) is affected by its previous state. Some studies have found that a certain percentage of the time a fetus will not respond to a particular stimulus. This means that a false negative result can occur even though the fetus is doing fine.

 These problems mean that more research needs to be done into this technology. Until these issues are resolved, it is recommended to only use this test if it is warranted.

 [![](https://alsuprun.com/blog/wp-content/uploads/RadionicMerch.png)](https://alsuprun.com/merch.html) 

## Is Vibroacoustic Stimulation safe?

 The use of acoustic stimulation to make tests on the fetal heart rate more effective is an important part of antepartum care. This method of acoustic stimulation has been used to wake the unborn baby from sleep periods so that they can respond to a test, such as the Non-Stress Test (NST). The NST is a common and inexpensive prenatal diagnostic technique that measures the baby’s heart rate when the mother feels them move, usually during the third trimester. The purpose of the NST is to see if the baby’s heart rate goes up and down with movement, which demonstrates their well-being. If the NST results show a decrease in fetal heart rate, it could indicate that the fetus is not well and may be at risk for complications.

 The acoustic stimulus may also cause the fetus to release catecholamines, which may be responsible for the increased fetal heart rate observed during the test. A study conducted by Keirse MJNC, Renfrew MJ, Neilson JP and Crowther C (published in the Cochrane Pregnancy and Childbirth Trials Module, September 2013) measured blood levels of noradrenaline and adrenaline in 13 healthy term fetuses before and during the [vibroacoustic stimulation](https://alsuprun.com/) for 3 seconds. They found no significant changes in either of these hormones.

 This suggests that acoustic stimulation is safe, particularly in the hands of trained medical professionals. However, it is not recommended to perform a VAS without a doctor’s supervision as it can result in serious medical complications. It is also not a safe procedure to be used at home, as it requires specialized equipment and knowledge of the effects of acoustic stimulation on the fetus.

 More research is needed to determine the optimum intensity, frequency and duration of acoustic stimulation to ensure maximum effectiveness and safety. More randomised controlled trials should be encouraged to determine the efficacy, safety and perinatal outcomes of acoustic stimulation when used in conjunction with cardiotocography and other tests of fetal wellbeing. Additionally, the need for further research to identify the specific pain relieving characteristics of the acoustic stimulus is paramount.

 

## What are the benefits of Vibroacoustic Stimulation?

 [Vibroacoustic stimulation](https://alsuprun.com/) promotes relaxation and relieves pain by triggering the release of endorphins, your body’s natural painkillers. The soothing vibrations also increase circulation and improve lymphatic flow, allowing for the elimination of toxins and the delivery of vital nutrients to the cells. These benefits are particularly beneficial for women dealing with fibromyalgia and arthritis.

 In terms of fetal health, fetal [vibroacoustic stimulation](https://alsuprun.com/) can help to improve the accuracy of cardiotocography tests by reducing non-reactive test results due to fetal sleep states and by provoking more fetal movement. This can lead to improved ultrasonic visualisation and diagnosis of the fetus and may allow for more efficient use of perinatal resources.

 The process of getting a [vibroacoustic therapy](https://alsuprun.com/) session begins with the therapist asking you to lie down on a mat or recliner that is specially designed to transmit sound waves and vibrations throughout the body. The vibrations will then begin to reverberate through your body, creating a gentle massage-like sensation and easing the tension. As the vibrations ebb and flow, your body will become more relaxed, helping to alleviate the discomfort that is often associated with chronic pain conditions such as fibromyalgia.

 Once your body is fully relaxed, the therapist will begin to stimulate the baby through a hand-held electronic device placed just above the pregnant woman’s abdomen. The brief sounds sent through the fetal [vibroacoustic](https://alsuprun.com/) stimulator will awaken the unborn child, which will then respond by increasing its movements.

 As the sounds and vibrations continue to pass through the fetus, your maternity care provider will be able to monitor the fetal heart rate and movement to assess how well it is responding to the stimuli. In the past, studies have shown that fetal [vibroacoustic](https://alsuprun.com/) stimulating before labour can significantly reduce the number of women who experience non-reactive cardiotocography testing (nine trials; RR 0.62, 95% CI 0.47 to 0.83) and can help to induce more vigorous fetal movements during antepartum fetal wellbeing testing (one trial; RR 0.23, 95% CI 0.18 to 0.29) and fetal distress testing (three trials; RR 0.35, 95% CI 0.21 to 0.42). However, more research is needed to determine the optimal frequency, intensity, duration and position of fetal [vibroacoustic therapy](https://alsuprun.com/) in conjunction with tests of fetal wellbeing.

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