When Do We Become Left or Right-Handed ?
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When Do We Become Left or Right-Handed ?

Explaining when does one become a real left-handed person or a right-handed person. Some thinks it's pure gambling, others don't even though some studies show clearly that it's not 100% random. We'll go over those different studies in order to understand what's really happening regarding the choice of being a right or left-handed human being.
At first, the state which determined if one was right or left-handed didn't really interest anyone as more important matters were existing. However, over the past years more and more studies have being conducted toward the understanding of this handedness state of human beings.
"Handedness", the preference of using one hand from an other seems to be determined even before birth. Some Irish studies showed that 90% of fetuses suck more often their right thumb than their left one and 10% don't. So in a way, we could say virtually all fetuses that are "right-handed" will keep this handedness and stay right-handed once fully grown. On the opposit, only two thirds of left-handed babies will turn out to be "real" left-handed. Like all studies, nothing is truly precise, especially when these studies focuses on too few individuals in order to be extrapolated to the entire population. During the first few months, each and every babies have a fluctutating handedness, thus nothing is really determined at that point.
French studies based on babies aged of 3 or 4 months highlighted a preference for the left hand when the child reaches for an object without actually taking it and a preference for the right hand when the baby wishes to grasp an object. Then, once the child reaches the age of 2, she or he will constantly take object with his prefered hand and it will become more and more evident. Finally, this handedness stabilizes at the age of 6 or 7, while it will have to learn handwritting, the child will need to pick a hand, most likely the one he's manipulating best.
Overall, 10% of adults are left-handed opposed to 90% of right-handed adults, among them are hidden some left-handed that never actually realized it. Some like to write with their left hand and others with their right yet the learning will never make the spontanous hand preference disapear. Putting a toy in the left hand of a baby will not make him a "real" left-handed.
Some British geneticists believe that the gene LRRTMI favours the left-handed state. Genetic studies also show that there is a 9% probabilty of having a left-handed child if you're right-handed and 30% for left-handed parents. Thanks for reading through ! If you enjoyed this article and wish to learn more about human science or interesting facts simply check out my profile here: http://boblebg.knoji.com/ where all my articles are listed ! I've also written plenty of IT articles so if you're new or interested in learning more check my writtings out ! Have a nice day.

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