Bottle feeding infants is associated with left-handedness, according to a new study.

The study finds that the prevalence of left-handedness is lower among breastfed infants as compared to bottle-fed infants. The researchers identified this finding in about 60,000 mother-infant pairs and they 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.