The meta-analysis, which look at over 60,000 mother-child relationships, has now shown that left-handedness is lower among breastfed infants compared to bottle-fed infants.
To be very clear, this isn’t to say that breastfeeding will cause a child to be right-handed, or that bottle-feeding will lead to left-handedness (or that either is better than the other).
After all, research has shown that a person’s dominant hand is determined at least partially by genetics long before birth. And, of course, correlation doesn’t equal causation.
Instead, the authors are suggesting that breastfeeding could play a fascinating role in which side of the brain controls our dominant hand, a process called cerebral lateralisation.