Autism spectrum disorder is caused not only by environmental factors but also by genetic inheritance. This disorder can range from mild to severe and occurs in many different forms. Symptoms include speech disorders, disorganized speech; sensory processing disorder causing absent responses, sleep disorders, depression and anxiety, obsessive compulsive disorder and many others. The diagnosis of autism does not include medical tests but a team of physiologists and doctors observe the child during an autism-specific behavioral evaluation and in some cases genetic testing is necessary. The exact cause of autism is still unknown, although there are many factors that play a role in it, for example the mother's weight, teratogens and genetics. There is a prenatal diagnosis of autism known as chromosomal microarray (CMA), the technology detects copy number variations (CNVs) - deletions or duplications of stretches of DNA that are too small to be seen using a microscope. CNVs have been increasingly linked to psychiatric and other disorders, including autism and schizophrenia (Emily Singer, 2012). This genetic disease runs in my family; it's from my mother and father, as in most cases of autism we don't know if it's due to genetic or environmental causes, or both. If both parents are carriers of the autism gene, the percentage of the child being a carrier is very high, much higher than if only one parent was a carrier. In conclusion, if you know you have this gene in your family, getting genetic counseling before having children would be a wise decision. Children with this disease cannot live normal lives, and daily functions are very difficult for people living with autism spectrum disorder. AUTISM SPECTRUM DISORDER 2Autism...... in the center of the sheet ......d with autism spectrum disorder (ASD). Learning Support, 27(1), 38-41. Doi:10.1111/j. 1467-9604.2011.051505.xGoldstein, S., Naglieri, J. A., Rzepa, S., & Williams, K. M. (2012). A national study of autistic symptoms in the general population of school-age children and those diagnosed with autism spectrum disorders. Psychology in the Schools 49(10) 1001-1002Robson, B. (2013) Autism spectrum disorder: a review of the current understanding of pathophysiology and complementary therapies in children, Australian Journal of Herbal Medicine 25(3) 128-129Samson, AC ( 2013). Humor (lack) clarified: Sense of humor in individuals with autism spectrum disorders: Review and introduction. Humor: International Journal of Humor Research, 26(3), 394-395. doi:10.1515/humor-2013-0027Singer, E. (2012) More sensitive prenatal tests detect variants linked to autism, 12 March 2012