Researchers from Durham and Lancaster Universities in the U.K. recently discovered a connection between a baby’s ability to predict its own facial touching and its level of physical and psychological development. The discovery was made possible by 4D imaging technology, which shows 3D ultrasounds in real time. In later stages of gestation, namely in the third trimester, the pre-born child begins to anticipate his own actions by opening his mouth while his hand is traveling towards his face.
U.K.’s Daily Mail described the observation:
In the earlier stage of gestation they saw babies touch the upper part and sides of their heads, although later on they began to touch the the lower, more sensitive, part of their faces and mouths.