Is autism a genetic disorder? How is autism caused?

Autism is not hereditary, but there is a connection with the mother, and if the mother has an excess of elements in her body that affect the production of autism during pregnancy, then the child will inevitably develop autism.

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The cause of autism is not yet clear, it may be that genetics and environment play a role, and the relevant factors are as follows: the first is heredity, and the role of heredity in autism has also been clarified, and more than ten related genes on long chromosomes have been found, and the risk rate of autism in the mother of autistic patients in childbirth is 5%. The second is perinatal factors, and there are more perinatal complications such as birth trauma and intrauterine asphyxia than in the normal control group.

The third is related to infection, immune system abnormalities, viral infections, decreased number of T lymphocytes, decreased activity of natural killer cells, etc. The fourth is neurosecretion and neurotransmitters, which are associated with dysregulation of multiple neurosecretions and neurotransmitters. Studies have found that monoamine neurotransmitters such as serotonin, pineal gland, and hypothalamic pituitary adrenal axis abnormalities in patients with autism lead to an increase in serotonin endogenous opioid peptides and a decrease in adrenocorticotropic hormone secretion by adrenaline, which may be related to the onset of the disease.

Suggestion: The main causes of autism are as follows:

1) Brain injury: Factors such as cerebral dysplasia caused by embarrassing miscarriage during pregnancy, premature birth, dystocia, neonatal brain injury during childbirth, and brain injury caused by encephalitis, meningitis and other diseases in infants may increase the chance of autism.

2) Viral infection during pregnancy: Women may suffer from measles or epidemic virus infection during pregnancy, which can damage the brain development of the fetus and lead to autism.

3) Genetic factors: In 20% of autistic people, his family can find people with mental retardation, language retardation and similar autism. In addition, about 10% of boys with autism have chromosomal fragility.

4) Metabolic diseases: congenital metabolic disorders such as benzoneturia, which cause dysfunction and disorder of brain cells, affect the function of brain nerve information transmission, and cause autism.

5) Of course, there are other reasons for this, but none of them are definite. Autism is an escape from an indifferent, dangerous outside world. Behaviorists believe that autism is the result of inappropriate reinforcement of a child's behavior by parents.