Perinatal. Referring to the period of time surrounding an infant's birth, from the last two months of pregnancy to the first 28 days of life. The TORCH panel tests for perinatal infections.
1 CMT1 is commonly caused by a duplication of a gene on chromosome 17. This gene controls the production of your nervesâ protective myelin sheath. CMT1 is also caused by other gene defects.  CMT2 results from a defect in your peripheral nerve cellsâ axon. This is caused by a defect in your mitofusin 2 gene.
Causes of Tourette Syndrome. Tourette Syndrome (TS) is a complex, neurological condition and it is not yet known what causes it. The condition is hereditary and a person with TS has, roughly, a 50 per cent chance of passing on the gene to their children. This doesnât mean, though, that the child will inherit an identical form of TS.