Scientists say it’s possible to predict whether the baby is going to be left- or right-handed by watching the preference of the 10 weeks fetus. Research found that if the fetus (during the 10th to 12th week) prefers using (moving or sucking) its right thumb more, then it’s so possible that the baby will be right-handed. These findings (by a group of researchers in Queens University-northern Ireland) contradict the common belief that says a person’s tendency towards using the left or right hand is determined only when the kid is 3 or 4 years old. There is no proof that this preference is due to brain control, but according to the researchers, this preference is simply because the fetus uses the side that has developed faster.
Source: Al-Rai