Read to Me, Mamma: The Voice as the First Embrace

Article written in collaboration with @semidilettura

The Prenatal Bond Through Reading

Pregnancy is often experienced as a waiting — a suspended time between the present and the encounter with a being not yet seen, but who already exists, already perceives, already responds. Yet research in perinatal psychology and developmental neuroscience offers us a far richer picture: the baby in the womb is not a passive subject. It is a sentient being, actively listening to the world around it, and in particular to the voice of the person carrying it.

Reading aloud during pregnancy is not a decorative gesture, nor a practice reserved for the most creative mothers. It is an act of care with solid biological and psychological foundations, capable of influencing the neurological, emotional, and linguistic development of the child even before birth.

Fetal Auditory Development: When Does the Baby Begin to Listen?

To understand why the maternal voice has such a significant effect, it is necessary to start from the development of the auditory system. Around the 18th–20th week of gestation, the fetal cochlea reaches a functional maturity sufficient to transmit sound stimuli to the central nervous system. From the 25th–28th week onward, the fetus is able to respond to external sounds with variations in heart rate, movements, and changes in sucking patterns (Lecanuet & Schaal, 1996).

The privileged channel of sound transmission is the amniotic fluid, which conducts acoustic vibrations directly to the baby. In this environment, the mother's voice has unique acoustic characteristics: it is perceived both through the air and by bone conduction through the maternal body, making it more intense, richer in low harmonics, and above all more familiar than any other voice (Fifer & Moon, 1994).

This perceptual specificity has important consequences. Already in the first hours after birth, newborns show a measurable preference for their own mother's voice over that of a stranger — a preference that can only be explained through learning that took place in the prenatal period (DeCasper & Fifer, 1980).

Fetal Memory: The Baby Learns Before Being Born

One of the most fascinating and scientifically documented aspects concerns the fetus's capacity to memorize complex auditory stimuli. The pioneering study by DeCasper and Spence (1986) demonstrated that newborns whose mothers had read the same story aloud during the third trimester of pregnancy showed, after birth, a significant preference for that text over unfamiliar ones. This preference was measured through the non-nutritive sucking paradigm, a method that allows researchers to detect the direction of attention in newborns: babies modulated their sucking rate so as to preferentially listen to the already "known" text. These findings suggest the existence of a functional prenatal auditory memory, capable of storing complex sound patterns such as those found in narrative speech.

Research by Granier-Deferre and colleagues (2011) extended this paradigm to musical melodies, demonstrating that fetuses exposed to a specific melody from the 35th week continued to show recognition of it at one month of age, with differential cardiac responses compared to novel melodies. What the baby hears in the womb does not vanish at birth: it is deposited as a memory trace, as the first form of continuity between intrauterine life and postnatal life.

Recognition of the Maternal Voice: A Neurobiological Imprint

If fetal memory is an established fact, equally relevant is the specificity of maternal voice recognition. Kisilevsky and colleagues (2003) conducted a methodologically rigorous experiment: they separately recorded the voice of the mother and that of an unfamiliar woman reading the same text, and played them back through a loudspeaker placed on the abdomen of women in advanced pregnancy (36 weeks). Fetuses responded with an increase in heart rate to their own mother's voice and with a decrease to the stranger's voice — two opposite patterns indicating a perceptual discrimination already fully operative before birth.

This capacity for recognition is not a simple reflex: it reflects sophisticated cognitive processing, which implies the comparison between an incoming stimulus and an already-formed internal representation. In other words, the baby already knows what its mother's voice sounds like — it has memorized it, made it familiar, made it its own.

Voice, Prosody, and Language Acquisition

A less discussed but crucial aspect concerns the role of prenatal reading in language development. The fetus does not process words in the semantic sense, but is extraordinarily sensitive to prosody — that is, the set of rhythm, intonation, stress, and melody that characterizes every language. Moon, Cooper, and Fifer (1993) demonstrated that newborns just two days old show a preference for their own native language over a foreign one, suggesting that prenatal exposure to the prosody of the mother tongue constitutes the perceptual foundation upon which subsequent language acquisition processes are built.

Reading aloud during pregnancy is, from this perspective, an activity with concrete implications for language development: the baby is exposed to the phonetic, rhythmic, and melodic structure of its mother tongue at a time when the nervous system is maximally plastic and receptive.

Effects on Maternal Health and the Mother–Baby Bond

The analysis cannot be limited to the fetal side. Reading during pregnancy has documented effects on the mother as well. Filippa, Devouche, and Gratier (2017), in a systematic review on the effects of the maternal voice on neonatal development, highlight how activities involving direct vocalization toward the baby — including reading and singing — facilitate the formation of a mental representation of the baby as a subject, a process referred to in perinatal psychology as "prenatal mentalization" or the development of the "imaginary baby" (Ammaniti & Tambelli, 2010).

Talking, singing, and reading to the baby in the womb helps the mother build the relationship internally before it becomes visible. Every act of vocalization is also an act of recognition: the baby exists, listens, responds — even if not yet in words.

On the side of maternal psychological wellbeing, several studies correlate prenatal communication practices with a reduction in pregnancy-related anxiety and with higher scores on prenatal attachment scales (Salisbury et al., 2003). This is not a secondary effect: reducing maternal stress has direct implications for fetal cortisol levels and, in the long term, for the child's emotional regulation.

How to Integrate Reading Into Everyday Pregnancy Life

From a clinical and psychoeducational perspective, it is useful to offer pregnant women concrete guidance that is free of excessive expectations. There is no single "right method" for reading to one's baby: what matters is the voice, the presence, and the repetition.

Reading can be combined with touching the bump, creating a multimodal experience that brings together the auditory and tactile channels — a dual pathway of communication that strengthens the sense of connection. Nursery rhymes and poems, thanks to their regular rhythmic structure, are particularly well-suited because they fully exploit fetal sensitivity to prosody. Singing, in this sense, is perhaps the oldest and most powerful form of prenatal storytelling.

It is also important to involve the partner: the baby will learn to recognize their voice as well, broadening its relational universe even before birth. Studies on paternal voice recognition suggest that this familiarity, too, is built in utero, with measurable effects in the neonatal period (Kolata, 1984, as cited in DeCasper & Spence, 1986).

Conclusions

The voice is the first instrument of care. It is the first language of love, the first thread connecting two nervous systems — one already formed, the other still under construction. Reading during pregnancy is not an optional extra for particularly dedicated mothers: it is a practice supported by neurobiology, developmental psychology, and perinatal research.

Every story read, every lullaby sung, every word spoken close to the bump is a building block in the construction of the bond. The baby is listening. And when it is born, it will already know how to recognize that voice — because it has learned it, memorized it, and carried it as its first certainty about the world.

References

Ammaniti, M., & Tambelli, R. (2010). Psicologia della gravidanza. Il Mulino.

DeCasper, A. J., & Fifer, W. P. (1980). Of human bonding: Newborns prefer their mothers' voices. Science, 208(4448), 1174–1176. https://doi.org/10.1126/science.7375928

DeCasper, A. J., & Spence, M. J. (1986). Prenatal maternal speech influences newborns' perception of speech sounds. Infant Behavior and Development, 9(2), 133–150. https://doi.org/10.1016/0163-6383(86)90025-1

Fifer, W. P., & Moon, C. M. (1994). The role of mother's voice in the organization of brain function in the newborn. Acta Paediatrica, 83(397), 86–93. https://doi.org/10.1111/j.1651-2227.1994.tb13270.x

Filippa, M., Devouche, E., & Gratier, M. (2017). Maternal voice and infant development: A review. Acta Paediatrica, 106(8), 1229–1238. https://doi.org/10.1111/apa.13857

Granier-Deferre, C., Bassereau, S., Ribeiro, A., Jacquet, A. Y., & DeCasper, A. J. (2011). A melodic contour repeatedly experienced by human near-term fetuses elicits a profound cardiac reaction one month after birth. PLoS 

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Kisilevsky, B. S., Hains, S. M. J., Lee, K., Xie, X., Huang, H., Ye, H. H., Zhang, K., & Wang, Z. (2003). Effects of experience on fetal voice recognition. Psychological Science, 14(3), 220–224. https://doi.org/10.1111/1467-9280.02435

Lecanuet, J. P., & Schaal, B. (1996). Fetal sensory competencies. European Journal of Obstetrics & Gynecology and Reproductive Biology, 68(1–2), 1–23. https://doi.org/10.1016/0301-2115(96)02509-2

Moon, C., Cooper, R. P., & Fifer, W. P. (1993). Two-day-olds prefer their native language. Infant Behavior and Development, 16(4), 495–500. https://doi.org/10.1016/0163-6383(93)80007-U

Salisbury, A. L., Law, K., LaGasse, L., & Lester, B. (2003). Maternal-fetal attachment. JAMA, 289(13), 1701. https://doi.org/10.1001/jama.289.13.1701