Autism her parent very rarely. An excessively frantic baby

Autism Spectrum Disorder is the
term used to describe a group of complex disorders of the development of the
brain (CDC 2014). There are several types of autism that are derived from
different genetic combinations and environmental factors. The most common type
is Autism Disorder. It is characterized by impaired speech and nonverbal communication,
challenges with social skills, and repetitive behaviors. Asperger Syndrome is
characterized by milder symptoms of the Autism Disorder, including social
problems and unusual behavior.  Unlike
the people with Autistic Disorder, individuals do not have any intellectual
challenges or trouble with language. Persuasive Developmental Disorder is
diagnosed to someone who has some symptoms of both Autism Disorder and Asperger
Syndrome. They do not have all the symptoms and they could potentially have
only challenges with communication and social skills.

This disorder can usually be detected
during the first three years of life. At the infant stage, a common behavior that may be
exhibited are avoiding physical contact. Infants with autism are described as
either passive or excessively frantic babies. A passive baby is one who is often
quiet who demands his or her parent very rarely. An excessively frantic baby is
one who cries a lot, sometimes non-stop, while he or she is awake. Sometimes
these children develop the habit of rocking back and forth. At the toddler
stage, they might have begun talking, crawling, and walking, much earlier than expected,
or this gets considerably delayed. Autistic symptoms begin to develop somewhere
between 1 1/2 to 3 years of age. They are often referred to as having
‘regressive’ autism. During childhood, autistic children may have a delay in
the areas of communication, social skills, and cognition. They can be described as living in their own
world and antisocial towards others (CHW). They avoid making eye-contact with
others as well. One third of the people with autism do not speak and one in
every 88 children gets diagnosed with autism.

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There is no exact proven cause
of autism. Two possible causes of autism include fetal exposure to the
antibody, immunoglobulin G (IgG), and sexually reproducing as male at an old
age. If the mother has an underlying autoimmune disease or has reactivity to
fetal antigens, autoantibodies produced before or during pregnancy can target
tissues in the developing fetus. One such tissue is the fetal brain (Fox,
Amaral, Van de Water 2012). Studies show that genetic impairments in
cognition and behavior, or autism, are possibly linked to the presence of antibodies
gaining access to human fetal brain tissue.

Many studies and experiments have been
conducted to test this hypothesis. Researchers tested these antibodies and gave
them to pregnant mice and monkeys; as a result, their offspring had odd
behavior (Diamond, Gregersen, Brimberg). In another study, researchers gave a
serum from mothers of children with autism to pregnant mice. The offspring had cognitive
dysfunctions, as well as social and motor skill deficits.