Therefore, when the right side of the brain is ready to send connecting nerves to the left side, the cells do not yet exist in the boy's brain.
So the connecting fibers go back and form connections within the right hemisphere making it a well-connected part of the brain in boys.
Brain research affirms that many of the differences in the ways boys and girls grow and learn are due to differences in their brains.
In the early weeks of gestation, all fetuses share female characteristics.
The left side of the brain that controls thinking develops later than the right - the part that deals with spatial relationships.
In boys, however, this lag in development of the hemispheres is greater.
Gender differences shaped by sex hormones during prenatal development also cause brains of boys and girls to function differently.