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Anencephaly

Anencephaly is a birth defect that affects the closing of the neural tube during pregnancy. The neural tube is a narrow channel that folds and closes during the third and fourth weeks of pregnancy to form the brain and spinal cord. Anencephaly occurs when the portion of the neural tube that forms the brain does not close. This results in the baby lacking parts of the brain, skull, and scalp.

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This effort is supported by funding from the U.S. Centers for Disease Control and Prevention Environmental Public Health Tracking Program, Cooperative Agreement Number 5U38EH000619-02. The contents of this Website are solely the responsibility of the authors and do not necessarily represent the official views of the Centers for Disease Control and Prevention.