I've been making some tests on the child's sensibility on an external organ called placenta which they loose at the moment of birth.
My theory is that the placenta is a child's sensitive organ used to communicate with the mother's exterior.
The first evidence I have is that whenever I put my hand over the big thing containing a placenta with a child inside the child starts knocking on my hand, this indicates that the child has the means to know my hand's position over the placenta and move towards it.
The second experiment was similar to the first one, but with the lights off. The result was the same: the child knocked on hand.
The third experiment I will be doing is to play with the child moving my hand to different places around the placenta and wait for the child to knock on my hand before any other place. This game will need some practice from both parts but after it's dominated it will prove somehow that the childs can use their placenta to know the position of a hand over it.