Baby Photograph

Brain Development Timeline

Brain development begins shortly after conception and continues throughout a person's life. At birth an infant has essentially all the neurons she will ever have. Processes such as myelination and synaptogenesis are well underway before an infant is born, but the brain is not complete at birth.


Our brains continue growing and changing throughout life. To learn more about changes in the brain during different periods of development, click on the images below.

Prenatal Timeline Newborn Timeline Childhood Timeline Adolescence Timeline Adult Timeline