That means the possible number of connecting points in a new born baby's brain is about one quadrillion connections. However, at birth, only about seventeen percent of those connections have been made the vast majority - the other 83% will be wired to gether in the days and weeks the months the years and now we know, even the decades that follow As I mentioned earlier, the wiring of a baby's brain is driven by the constant interplay between two powerful forces. the first is genetics what I like to think of as the hardwiring the other is the baby's experiences the software