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Member Research & Reports

Member Research & Reports

Washington: Long-term Breastfeeding Sheds Light on Right- or Left-handedness

Bottle feeding infants is associated with left-handedness, according to a new study from the University of Washington. Lead author Dr. Philippe Hujoel is a professor in the UW School of Dentistry and adjunct professor of epidemiology in the University of Washington School of Public Health.

The study found that the prevalence of left-handedness is lower among breastfed infants as compared to bottle-fed infants.  This finding was identified in about 60,000 mother-infant pairs and accounted for known risk factors for handedness.

The results provide further insight into the development of complex brain functions which ultimately determine which side of the batter box the infant likely will choose.

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