From the research of family and twin children, it is found that about 10% to 20% of autistic twin brothers and sisters may have a slight autism tendency.

2. Infected by disease

During pregnancy, women may suffer from German measles or rubella, which may damage the brain development of the fetus and lead to autism. In addition, metabolic diseases may also cause dysfunction of brain cells and affect the function of transmitting information to brain nerves, thus causing autism.

In addition, fetal brain hypoplasia, premature delivery, dystocia, neonatal brain injury and brain injury caused by diseases such as encephalitis and meningitis in infancy may increase the chances of autism.

Extended data

main performance

1, social disorder

Generally speaking, it is the lack of communication or communication skills with others and the lack of safe attachment with parents.

2, language communication barriers

Language development is backward, or language retrogression occurs after normal language development, or language lacks communication.

3. Repeat rigid behavior.

4. Abnormal intelligence

About 70% autistic children are mentally retarded, but these children may have strong abilities in some aspects, of which 20% are within the normal range and about 10% are extraordinary. Most of them have a good memory, especially in mechanical memory.

Most of them are backward and unbalanced in intellectual development.

Most children's intelligence development is slower than their peers, and a few children's intelligence is normal or close to normal. However, some of them are surprisingly good at some aspects of intellectual activities, which is incredible. Many children have strong mechanical memory, especially for words and symbols.

Baidu encyclopedia-autism