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At what week is a baby's brain fully developed?

Early Pregnancy

Neural tube development begins after conception, forming the basis of the brain and spinal cord.

First Trimester

By the end of the first trimester (around 12 weeks), the basic structure of the brain is formed, and major regions can be identified.

Second Trimester

Rapid growth and refinement of the brain occur, with synapse formation peaking.

Third Trimester

Continued growth and maturation of the brain, including the development of cortical folds and increased myelination.

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