Anencephaly
What is Anencephaly? Anencephaly is a type of neural tube defect (NTD). The neural tube is a hollow tube that folds and closes during embryonic development to form the brain…

Birth Defect Research for Children
The National Birth Defect Registry needs families like yours. By joining, you help researchers find causes, prevent future cases, and improve treatments.
What is Anencephaly? Anencephaly is a type of neural tube defect (NTD). The neural tube is a hollow tube that folds and closes during embryonic development to form the brain…
What is Amniotic Band Syndrome? ABS refers to abnormalities caused by fibrous strands that can entangle or confine developing parts of the fetus. These strands are believed to arise from…
What is Agenesis of the Corpus Callosum (ACC)? Agenesis of the Corpus Callosum means a complete or partial absence of the bridge between the left and right sides of the…
What is Adams Oliver Syndrome? Adams Oliver Syndrome is a disorder characterized by scalp and skull defects and abnormalities of the limbs, fingers, and/or toes. The physical abnormalities vary greatly…

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