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. A 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 cells on the dorsal side of the fetus begin to fuse and form the neural tube. When the neural tube does not close completely, an NTD develops.
... in various forms, most interestingly as acetylcholine, (an uncommon occurrence outside of neural tissue) ... Concentration is also important in getting choline in to the brain for use to prevent neural nonclosure and poor brain development ... Neural tube closure While folate is most well known for preventing neural tube nonclosure, (and this is the basis for its addition to prenatal vitamins), folate and choline metabolism are interrelated ...
... Spina bifida is caused by the failure of the neural tube to close during the first month of embryonic development (often before the mother knows she is pregnant) ... Under normal circumstances, the closure of the neural tube occurs around the 23rd (rostral closure) and 27th (caudal closure) day after fertilization ... However, if something interferes and the tube fails to close properly, a neural tube defect will occur ...
... drinking during pregnancy is associated with birth defects such as intrauterine growth retardation, microcephaly, cardiac abnormalities and maxillary ... a human teratogen which may cause ear malformations, facial abnormalities, cleft palate and open neural tube defect ... of these drugs by pregnant women in the second or third trimester has been associated with birth defects such as intrauterine growth retardation ...
Famous quotes containing the words defect and/or tube:
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