Herzklang® during pregnancy:
To improve the emotional bonding between mother and child
There are now many studies on the development of fetal hearing and the effects of intrauterine and external sound (the voice of the mother or music) on the fetus and its development.¹
Herzklang during pregnancy uses music not as a stimulation but rather as a means of communication, through which we can perceive the vital, changing rhythms of the maternal and fetal autonomic regulation and thus their respective emotional and physiological states. Particularly important is the perception of the symbiotic nature of the maternal and fetal heart activity and the reciprocal influence of this activity on the respective autonomous regulations of the other.
New studies give clear evidence of a direct physiological interaction between the maternal and fetal heart activity.²
Herzklang during pregnancy, measures the maternal and fetal heart rate variabilies (HRV) and converts them into music.
describes the ability of the autonomic nervous system to continuously
the time intervals of one heartbeat to the next, according to load, and
flexibly and rapidly, to ever-changing challenges. It is a
measure of the
global fitness of an organism to internal and external stimuli (stress).
in whom HRV is restricted, develop in a much
higher percentage, sooner or later, a sustained extreme level of
stress hormones, suppressed immune activity and a wide range of stress
somatic, psychosomatic and mental disorders.
From maternal and fetal heart rate variability:
Here are some examples (Flute: Fetus, Cello: Mother):
1 Jolin & Joelle Marie Grace
2 Anja & child
3 Sylvia & child
4 Heart rate rhythms
Herzklang during pregnancy consists of two phases:
The first phase of
listening, allows the
perception of the
own (maternal) and the child’s, but above all, the common
heart rhythms, or heart
melodies. Although the child’s heart rhythm is much faster
than the maternal,
both rhythms join together to a common melody, while maintaining their
The second phase: A stress intervention, on the basis of a regulated breathing exercise, helps the mother to synchronize her respiratory and cardiac systems and thereby balance the autonomic nervous regulation. The heart music changes audibly. This intervention reduces not only the current effects of stress; it will also help to better cope with stress and illness in the future.
Unplanned / unwanted pregnancies
Dr Thomas Verny: The Secret Life Of The Unborn Child: A remarkable and controversial look at life before birth, Sphere , New Ed edition (1 Jan 1982), ISBN-13: 978-0751510034
1. "The Acoustic Environment and Physiological Responses of the Fetus " http://www.nature.com/jp/journal/v20/n1s/pdf/7200445a.pdf
of paced maternal breathing on
fetal–maternal heart rate coordination.