Q: At what age do babies develop a dominant side of their bodies? We've noticed our 6-month-old uses her left hand most of the time.
A: Most babies start out using their left and right hand about the same amount. They may use one hand and then the other. They may reach with whichever hand is closest. One moment they may seem right-handed but left-handed the next.
If their actions at 6 months give hints about which side will eventually be dominant, those hints are usually very subtle. Ordinarily, children slowly begin to show a hand preference between the ages of 1 and 3 but sometimes do not use the preferred hand consistently until they are even older.