The period from conception  to age three – is a critical time in baby brain development. This is because this period of life lays the neurological foundation for intellectual growth into adolescence and adulthood. 

From the moment of conception,  during 20th week of pregnancy, the complex connections required for the development of memory and thinking functions are being formed.

the neurons (nerve cells) of the brain multiply faster than any other cells in a baby’s body. The rapid pace of baby brain development continues into early childhood: at birth, the brain weighs 25 percent of its adult weight; by age one, 50 percent; by age two, 75 percent; and by age three, 90 percent.

The brain of an adult has over 100 billion neurons, the majority of which were formed during the first five months in the womb!

Research shows that a baby's brain starts shedding inactive cells in the seventh and eighth months. Parents can save these cells if they spend some time communicating with their unborn baby.

By doing so, they are stimulating the inactive cells, and giving the brain a reason to wire them in intelligent ways. You must remember that a baby with more active cells is more likely to be born a smart baby.