The human brain is developing, and keeps developing till the adulthood, starting from the birth, rather from the time of pregnancy. There are several factors which call for brain development includes the crucial time of the brain development during pregnancy. The brain needs nutrients and a reduced stress in the environment. Folic acid and other vitamins such as vitamin B6 and vitamin B12 play parts in the brain development. In the first few years after birth, the brain development occurs about 95%.