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Study Links Autism To Father’s Age

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NEW YORK (CBS NEWS) - The cause of autism is one of the great mysteries of medicine, but we found out something new and important on Wednesday. A report in the medical journal “Nature” says it is the age of the father at the time of conception, not the age of the mother that can raise the risk of autism in a child.

With more men becoming fathers later in life, it could help explain the rise in autism.

The study’s senior author — a scientist in Iceland — writes: “Conventional wisdom has been to blame the developmental disorders of children on the age of mothers” but “it is the age of fathers that appears to be the real culprit.”

Dr. Delores Maldespina, a psychiatrist at New York University, said she finds the research eye opening. “This study shows that new mutations are frequent enough as men age that fathers aging alone can explain the increase for the risk of autism,” Maldespina said.

The study says a father’s age could account for 15 to 30 percent of cases of autism, and perhaps other disorders like schizophrenia as well. “This study shows that when these diseases present without a family history, the origin is in the sperm of the man and that the risk goes up as the man ages,” Maldespina said.

The latest numbers from the Centers for Disease Control indicate the rate of autism has doubled in the last six years from 1 in 162, to 1 in 88.

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