Autism Risk May Increase If Gap Between Pregnancies Is Too Short Or Long, Columbia University And University of Turku Study

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A new study found an increased risk of Autism Spectrum Disorders (ASD) for children born less than a year or more than five years after the birth of their prior sibling. In the study, published in the October issue of Journal of the American Academy of Child & Adolescent Psychiatry, researchers from Columbia University and University of Turku analyzed the records of 7,371 children born between 1987 and 2005, using data from the Finnish Prenatal Study of Autism (FIPS-A). About a third had been diagnosed with ASD by 2007. Using several national registries, researchers compared the records of children with and without ASD, to find that the risk of ASD for children born less than 12 months after the birth of their prior sibling was one and a half times higher than it was for children born 2-5 years after their prior sibling.

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