Classical music is widely recognized for its ability to calm both the heart and mind, providing immediate emotional relief. The gentle melodies of classical compositions can create a perception of time slowing down. However, the influence of classical music extends beyond mere ambience; it has the potential to affect the heart rhythms of unborn infants. A recent study conducted by Claudia Lerma from the National Institute of Cardiology Ignacio Chávez and Eric Alonso Abarca-Castro from the Metropolitan Autonomous University Campus Lerma revealed that exposure to classical music can lead to variations in the heartbeats of fetuses, which may contribute positively to their early development post-birth.

Heart rate variability in fetuses:

The subtle fluctuations in the heart rate of unborn babies offer valuable insights into their developing nervous systems. The patterns of heart rate serve as a crucial indicator of fetal development, with variations reflecting either healthy growth or stress, depending on the degree of variability observed.

Study findings:

The research involved 37 pregnant participants whose fetal heart recordings were sufficiently clear for analysis. Two classical compositions were selected for the experiment: “The Swan” by Camille Saint-Saëns and “Arpa de Oro” by Abundio Martínez. The music was transmitted through specialized headphones placed on the participants' abdomens, with the volume maintained at a safe level comparable to that of a typical conversation.

The researchers noted a more pronounced effect of classical music on the heart rate patterns of fetuses. Claudia Lerma, the study's lead author from the National Institute of Cardiology Ignacio Chávez, stated, “In summary, we found that musical exposure led to more stable and predictable patterns in fetal heart rates.”

Co-author Eric Alonso Abarca-Castro from the Metropolitan Autonomous University Campus Lerma elaborated, “The second piece seemed to exert a greater influence on certain metrics, suggesting it generated heart rate patterns that were more consistent and regular. Elements such as rhythmic features, melodic composition, or cultural familiarity may contribute to this variation.”

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