1. 
   Neural tube defect
   Neural tube defect (NTD): A major birth defect caused by abnormal development of the neural tube, the structure present during embryonic life which gives rise to the central nervous system -- the brain and spinal cord. Neural tube defects (NTDs) are among the most common birth defects that cause inf...
   Found op http://www.medterms.com/script/main/art.html?articlekey=4547
   
   
2. 
   neural tube defect
   <neurology, paediatrics> Abnormal development during embryonic life of the neural tube producing congenital malformations of the nervous system due to closure failure of the neural tube. ... The structure gives rise to the central nervous system (the brain and spinal cord), and failure to clos...
   Found op http://www.mondofacto.com/facts/dictionary?neural+tube+defect
   
   
3. 
   neural tube defect
   a congenital defect in closure of the bony encasement of the spinal cord or of the skull. The most severe defects are a fissure along the entire length of the vertebral column, which leaves the meninges and spinal cord exposed (rachischisis), or herniation through the skull of a saclike structure co...
   Found op http://www.encyclo.co.uk/local/21001
   
   
4. 
   neural tube defect
   any congenital defect of the brain and spinal cord as a result of abnormal development of the neural tube (the precursor of the spinal cord) during ... [4 related articles]
   Found op http://www.britannica.com/eb/a-z/n/28
   
   
5. 
   Neural tube defect
   Neural tube defects (NTDs) are one of the most common birth defects, occurring in approximately one in 1,000 live births in the United States. An NTD is an opening in the spinal cord or brain that occurs very early in human development. In the 3rd week of pregnancy called gastrulation, specialized ...
   Found op http://en.wikipedia.org/wiki/Neural_tube_defect
   
   
6. 
   Neural Tube Defect
   A birth defect that affects the spinal column or brain of a developing fetus or baby. During fetal development, the neural tube does not close properlu and the brain, nerves, spinal cord and muscles can not properly develop. Neural tube defects are often related to inadequate folate and folic acid i...
   Found op http://www.pregnology.com/AZ/N/2
   
   

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