Re: SchaferAutismReport: Study: Moms Over 40 Nearly Twice As Likely To Have Autistic Children [1 Attachment]

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"But the authors of

the paper, from UC , calculate that older mothers account for less than

5% of the increase in autism diagnoses."Wasn't it the fathers age last year? TV the year before.... What's next?Subject: SchaferAutismReport: Study: Moms Over 40 Nearly Twice As Likely To Have Autistic Children [1 Attachment]To: "''" <deniseslist >Date: Tuesday, February 9, 2010, 7:23 PM

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RESEARCH Study: Moms Over 40

Nearly Twice As Likely To Have Autistic Children

The study of California births finds that in most cases, the father's age

plays little role in the likelihood of the disorder.

By H. Maugh II, LA Times. is.gd/7XzkW

Women who give birth after age 40

are nearly twice as likely to have a child with autism as those under 25,

California researchers reported Monday.

Surprisingly, the age of the father plays

little role in the likelihood of the disorder unless the mother is younger

than 30 and the father is over 40, according to

Dr. Irva Hertz-Picciotto of the UC MIND Institute

the analysis of all births in

California in the 1990s.

The number of women over age 40 in

California giving birth increased by 300% in the 1990s, while the diagnosis

of autism increased by 600%. At first glance, it might seem that the rise in

older pregnancies could be responsible for the rise in autism, which is now

thought to affect as many as one child in every hundred. But the authors of

the paper, from UC , calculate that older mothers account for less than

5% of the increase in autism diagnoses.

"There is a long history of blaming

parents" for the development of autism, said Dr. Irva Hertz-Picciotto of

the UC MIND Institute, the senior author of the report. "We're not

saying this is the fault of mothers or fathers. We're just saying this is a

correlation that will direct research in the future."

Researchers have long known that the age of

the parents plays a role in the risk of developing autism, but how big a role

and how that role varies with the sex of the parent has remained confusing,

with contradictory results reported in different studies.

To investigate, Hertz-Picciotto, Janie E.

Shelton and J. Tancredi analyzed all the singleton births in California

during the 1990s for which information was available about the ages of both

parents, a total of about 4.9 million births and 12,529 cases of autism.

Because of the large sample size, they were

able to show how the likelihood of autism was affected by each parent's age.

They reported in the journal Autism Research that women over 40 were 77% more

likely to deliver an autistic child than those younger than 25 and 51% more

likely than those aged 25 to 29, independent of the age of the father.

For men over 40, there was a 59% increased

risk of autism if the mother was younger than 30, but virtually no increased

risk if the mother was over 30.

The researchers also calculated that the

recent

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In This

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RESEARCH

Study: Moms Over 40 Nearly Twice As Likely To Have Autistic Children

Autism Risk Rises With Mother's Age The Older the Mother, the Higher Her

Child's Autism Risk

TREATMENT

When to Worry if a Child Has Too Few Words

Comparison of Data Collection Methods in a Behavioral Intervention Program

MEDIA

An Emmy for Danes in 'Temple Grandin'?

PUBLIC HEALTH

Ethics Debate Over Blood/DNA From Newborn Safety Tests

FINANCES

New Yorkers: Do You Need Financial Help to Raise Your Grandchild?

PEOPLE

A Weighty Diagnosis

LETTERS

On " Retracting a Medical Journal’s Autism Study", NY Times

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