- (empty)
total 0,00 €
taxes included
Autonomy, Basics, Cool, Creative, Ecologic, Musicos zurdos, The most bought
NEWS
22/02/2017
Health | Maternity
The magical phenomenon of life does not stop surprising us. The fact of whether a person will be left-handed or left-handed, can be determined at eleven weeks of gestation.
From the eighth week, the embryo becomes a fetus, and the baby already has all the internal organs formed, but not fully developed, and begins there, the formation of the fingers, hands and legs.
Around eleven weeks, the limbs are already formed and the baby begins to move them, taking from that moment predilection on one side over the other, sucking a thumb in concrete, the right hand or left or flexing more one leg than the other .
Experts are convinced that genetic factors are behind the predilection for one limb over the other, with nine out of ten right-handed embryos, and only 1% left-handed, and a very small percentage, below 1%, ambidextrous .
A team of American geneticists determined that there is a dominant gene that makes most people right. Researchers at the University of Oxford, in 2007, discovered that the LRRTM1 gene determines that we are left-handed.
If this laterality is the exclusive result of genetic or other factors to be determined, what is striking is that it is already visible at eleven weeks of gestation
