Music and foetal stimulation

Give your baby a universal stimulus, send him a message before he is born and make sure it reaches him.

The scientific study
institut Marquès

"Fetal facial expression in response to vaginal music emission."

World-first research on foetal hearing finds that from the 16th week of pregnancy, when the foetus is 11 cm long, there is already a response to music delivered vaginally through specific mouth and tongue movements.

The starting hypothesis suggests that music induces a vocalisation movement response by activating brain circuits that stimulate language and communication. In other words, learning begins in the womb.

To carry out the study, a special vaginal device was designed and subsequently marketed by the company Music in Baby under the name Babypod®.

Study results

After testing hundreds of pregnant women, Institut Marquès gynaecologists obtained the following results:

Play Video

Study conclusions

Music stimulates babies’ communication, vocalisation and learning circuits and generates a communication reaction in them.

87% of babies react to music streamed vaginally with body and head movements. In addition, they open and close their mouths, stick out their tongues and gesticulate. It is a discovery never seen before.

It is the music that generates a communication response in the baby, not the noise. When vibration is applied vaginally at 68 decibels (similar to a high-pitched conversation), the baby does not respond.

The response to music is different for each baby while a single baby presents different reactions each time the music is played. Babies also have different responses depending on the type of music they listen to.

It has been disclosed that the foetus can hear from the 16th week of gestation when so far this had only been confirmed from week 26.

This is not a reflex reaction, movements start when the music starts and stop when it stops.

The responses are more elaborate as the pregnancy progresses; the number of times babies stick out their tongues increases during pregnancy.

Medical uses

Babypod’s possible medical uses

Play Video

Babypod in ultrasound sessions

This discovery is a great advance for the sonographer, as the movements of the foetus allow him to see it more clearly and the time spent on ultrasound scans is shortened. Moreover, the different reaction of each baby in different ultrasound scans is a surprise that is shared with the parents, who leave the consultation satisfied and excited.

During the foetal morphological study, Babypod allows us to induce trunk, head and limb movements in 90% of foetuses and easily evaluate those structures that had remained hidden with the static foetus; being able to induce foetal activation during the ultrasound scans allows us to reduce scanning time and avoid recitations.

In Babypod ultrasound scans, vaginal music induces facial and mouth opening movements in almost 90% of foetuses, and tongue protrusion movements in 50%, which allows us to obtain spectacular images in less than 15 minutes.

Main hypothesis

The starting hypothesis suggests that music induces a vocalisation movement response by activating brain circuits that stimulate language and communication. In other words, learning begins in the womb.

What is the greatest discovery from this study? Why do babies react in this way? Why do they stick their tongues out and gesture in a way never seen before?

This response by infants is a direct consequence of their neuronal activity, caused by the music in different parts of the brain in humans.

Until now, thanks to various medical research studies, it was known that music acts on a nucleus of neurons in the cerebral cortex, the nucleus accumbens. This is why when we listen to music, we have feelings of wellbeing and pleasant feelings associated with our memories. The nucleus accumbens also makes music produce pleasure. However, in the case of babies, it is not the nucleus accumbens which causes the reaction, since this is not yet fully developed or is functional at 16 weeks of gestation.

What is activated with music vaginally is another very primitive group of neurons, located in the brainstem. These neurons stimulate vocalization, language and therefore learning and communication in babies. That is, through the use of music and with the help of Babypod, babies learn to communicate from the womb.

When receiving sound, the cells of this brainstem centre detect whether the sound is harmonic are dissonant. If associated with music, they are stimulated and set up a reaction, activating their connections with the cranial nerves, such as the trigeminal, the facial, the hypoglossal nerves, etc. These are the nerves that move the mouth, jaw and tongue to enable vocalization movements, the step prior to language.

Dissonant noises or sounds do not activate these circuits of neurons.

When they receive a sound stimulus, the cells in this brain centre are activated and set in motion a circuit that results in the baby’s vocalisation movements.

Why do we say that Babypod stimulates language and communication in the unborn? We can answer that question with another question: what do babies do when trying to make sounds? They open and close their mouths, stick out their tongues … just like unborn babies when they hear music through Babypod. It is the attempt of speaking, such an attempt, thanks to Babypod, can be stimulated from the womb.

Babies begin to vocalize spontaneously in response to the sounds they hear, they begin to explore the register of their voices. The more voices and music heard, the more variations of rhythm and tone are likely to be included in their vocalizations. We want to provide babies with the benefits of music from before birth.

Subsequent scientific studies

Later on, we will initiate studies on how it influences the development of their brain maturity.

World congress
European congress

Scientific Committee - Lines of research

Babypod research continues in the area of foetal hearing, as well as its possible benefits in prenatal neurological development. The professionals who make up our scientific committee evaluate the rigor and excellence of the different lines of research that we are developing.


From when can the foetus hear?

We know that the inner ear is fully developed at week 16 of gestation, but until now medical literature could only confirm a functioning auditory system from week 26. This research study shows for the first time that the fetus begins hearing at week 16.

What is heard in the womb?

The fetus receives sounds from inside the mother's body, such as her heartbeat, breathing and intestinal activity. It also perceives sounds the mother makes, such as when she is speaking or walking with high heels, in addition to other external sounds.

The fetus is well-protected from noise. The fact that it is living in a soundproof environment means that perceived sounds are distorted, as has been shown in research done on sheep using intrauterine microphones. According to this research, the majority of sounds are perceived as whispers (around 30 decibels), while the motherís voice during normal conversation (60 decibels) is barely discerned at all (24 decibels).

And, as most sounds are repetitive, the fetus becomes accustomed to them and does not react. They do not prevent the fetus from sleeping.

We could say that the sounds heard in utero are like the background rustles heard in a forest.

Is it possible for babies to perceive sounds as we do?

It is only possible through a single route, the vaginal route.

The vagina is a closed space, so sound is not dispersed into the environment. In addition, there are fewer layers of soft tissue separating the baby from the sound source, only the vaginal and uterine walls. By placing a speaker in the vagina, the barrier of the abdominal wall is removed and the baby can hear the sounds almost as loudly and clearly as they are emitted.

How do foetuses respond to vaginally delivered music?

Before the scan, the pregnant patient inserted the intravaginal device designed for the study, which emits an average sound intensity of 54 decibels (equivalent to a conversation in low voices or background music).

87% of fetuses reacted with non-specific head and limb movements, accompanied by specific mouth and tongue movements which stopped when the music stopped. Likewise, with intravaginal music, nearly 50% of fetuses reacted with a striking movement, opening their jaw very wide and sticking out their tongue as far as it would go.

How do foetuses respond to music emitted from the abdomen?

A set of headphones which emitted music with an average intensity of 98.6 decibels (equivalent to an ambulance siren or music in a nightclub) were placed on the pregnant womanís abdomen.

No changes were observed in fetal facial expression during this part of the study.

Why is the response of the foetus different every time it listens to music?

As we are looking at a response and not simply a reflex, the reaction of the fetus depends on multiple factors, which is why it is different each time. It varies depending on the neuronal activity of the brain stem at that particular moment, which means that the response could depend on the sleep phase the fetus is in or blood sugar levels. For example, when we sing to a baby, the response differs depending on whether the child is hungry, thirsty or sleepy.