A majority of mothers, whether right- or left-handed, exhibit a preference to hold their babies to the left of the body midline. One of the earliest explanations for this finding proposed that babies were being held close to the mother's heart. World Mental Health, 12, 168-175].
Salk suggested that the fetus becomes imprinted on the sound of the maternal heartbeat in utero. This paper reports a left holding preference in a mother who has the heart positioned on the right rather than the normal left side of the body. Salk's heartbeat hypothesis is not supported by the holding preference of the dextrocardiac mother, nor by the detailed patterns of holding in the control group.
wow never heard of this am left handed and a mom and my heart where it should be