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Fever in Pregnancy Tied to Autism Risk

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"Previous research has suggested a connection between autism and various infections during pregnancy, including measles, mumps, rubella and influenza."

Really? But not the vaccines for those diseases? Did we ever hear of this "previous research" before?

Winnie

(http://well.blogs.nytimes.com/2012/06/04/fever-in-pregnancy-tied-to-autism-risk/?nl=health & emc=edit_hh_20120605)

June 4, 2012, 3:57 pm

Fever in Pregnancy Tied to Autism Risk

By NICHOLAS BAKALAR

Running a fever during pregnancy is associated with a risk of autism spectrum disorders and developmental delays in the offspring, a new study reports.

Previous research has suggested a connection between autism and various infections during pregnancy, including measles, mumps, rubella and influenza.

In the new analysis, researchers studied 701 children with autism spectrum disorders or developmental delays and 421 normal controls. After adjusting for age and other health and socioeconomic variables, they found that women who reported having had a fever during pregnancy were more than twice as likely as those who did not to have a child with a developmental disorder.

Among women whose fever had been treated with drugs like Tylenol or Advil, the risk was indistinguishable from that of mothers who reported no fever.

“Fever is an acute inflammatory response,” said the senior author, Irva Hertz-Picciotto, a professor of environmental epidemiology at the Mind Institute of the University of California, . “So there is a suggestion that inflammation of some sort may play some role in autism causation. Untreated fever seems to be the place where the risk is.”

The scientists were unable to determine whether a fever at a specific time during pregnancy might alter the risk. They acknowledge that their data depend on self-reports, which are not always accurate.

The study was published online May 5 in The Journal of Autism and Developmental Disorders.

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