Birth Items

Vibroacoustic Stimulation Definition

In the birth industry, Vibroacoustic Stimulation (VAS) is defined as the use of low-frequency sound waves to help assess the progress of labor and the baby’s position and wellbeing. This non-invasive technique is used to measure the contractions of the uterus and can be used in conjunction with other monitoring techniques. It uses sound waves to create vibrations in the body. The sound waves are generated by a handheld device that emits a low-frequency vibration. The vibrations are transmitted through the skin and into the uterus, where they are detected by a fetal monitor.

VAS has been used for many years in the medical field but has only recently been used in the pregnancy and birthing industry. It is a relatively new technique but has already been shown to be beneficial in several studies. One study found that VAS was able to accurately predict the position of the baby in 97% of cases. Another study found that VAS was able to reduce the need for ultrasonography by 50%. VAS is a promising new assessment tool that could potentially help to reduce the need for other invasive procedures, such as ultrasonography, during pregnancy.

It is important to note that VAS is not a replacement for other monitoring techniques, and it should not be used as the sole method of assessment. VAS is just one of many tools that may be used during labor to help assess and progress the labor process. Other tools include vaginal examinations, cervical dilation checks, and fetal heart monitoring.

This image shows how often the term ‘Vibroacoustic Stimulation’ is used in relation to other, similar birth terms:

Other Uses

Outside of the birth industry, Vibroacoustic Stimulation may be used to:

– relieve pain

– improve circulation

– reduce stress

– promote relaxation


While VAS is safe for most people, there are some who should not use this technique. These include pregnant women with certain medical conditions, such as placenta previa or placental abruption. VAS should also not be used on anyone pregnant with more than one fetus. Moreover, as with any medical procedure, there are potential complications that could occur. These include:

  • Bleeding
  • Infection
  • Uterine rupture

If you are unsure whether or not Vibroacoustic Stimulation is right for you, please consult your healthcare provider.

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