Navigation Links
Closely Spaced Pregnancies Might Up Autism Risk: Study
Date:1/10/2011

By Jenifer Goodwin
HealthDay Reporter

MONDAY, Jan. 10 (HealthDay News) -- Having babies close together may triple the risk of autism in the second child, new research suggests.

The highest risk was seen in babies conceived within a year of their older sibling. Babies conceived within 12 to 23 months and 24 to 35 months of their older sibling were also at a heightened risk of autism, although the risk was not as pronounced.

Researchers looked at birth records for about 660,000 second-born children born in California between 1992 and 2002. Autism diagnoses were confirmed using records from the California Department of Developmental Services.

Second-born children conceived within a year of the birth of the first-born children were more than three times as likely to have autism than children conceived more than three years apart.

In addition, babies conceived within 12 to 23 months had nearly twice the risk of having autism, while babies conceived between 24 and 35 months were 26 percent more likely to have autism, the investigators found.

"We think this is important research because the finding provides an important clue about what may possibly be modifiable risk factors for autism," said study author Keely Cheslack-Postava, a postdoctoral research scholar at Columbia University in New York City. "But because we don't know what it is about the inter-pregnancy interval that actually matters we can't at this point say that increasing space between pregnancies is necessarily advice that should be given."

Researchers saw a similar trend among subsequent children; closely spaced third-born children were also at heightened risk of autism.

The study is published in the February issue of Pediatrics.

The reason why closely spaced pregnancies may up the risk of autism isn't known, but it could have something to do with the mother's body not having enough time to recover completely from the prior pregnancy, said Andy Shih, vice president of scientific affairs for Autism Speaks.

"When you have a child so quickly after the first, the womb environment may not have sufficiently recovered to properly support a second pregnancy," Shih said.

The researchers said the first pregnancy may deplete critical nutrients such as folate and iron, and the mother may also be more stressed during the second pregnancy.

The findings are especially important because of the trend in women having babies closer together. Between 1995 and 2002, the proportion of births occurring within 24 months of a previous birth increased from 11 percent to 18 percent.

This could be due to more women delaying first pregnancies and feeling hurried to have their second child because of worries about declining fertility, the researchers noted.

At the same time, the incidence of autism has been rising. Closely spaced pregnancies could be one, but definitely not the only, factor driving that, Shih said.

In the study, researchers took into account maternal and paternal ages, parental education and other factors that could affect autism risk or how likely a child is to receive a diagnosis of autism.

More information

The U.S. National Institute of Neurological Disorders and Stroke has more on autism.

SOURCES: Keely Cheslack-Postava, Ph.D., postdoctoral research scholar, Columbia University, New York City; Andy Shih, Ph.D., vice president, scientific affairs, Autism Speaks, New York City; February 2011, Pediatrics


'/>"/>
Copyright©2010 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. Survey Reveals Health Insurance and Access to Care Not So Closely Linked
2. New cancer drug screening technique more closely mirrors reality
3. Fertility Clinic Shows Support for Healthy Pregnancies By Sponsoring March of Dimes "March for Babies"
4. Women with gestational diabetes have increased risk of recurrence in subsequent pregnancies
5. Anorexia Linked With Unplanned Pregnancies
6. Herpes Drug Might Also Slow HIV Progression
7. Bonding Hormone Might Help Some With Autism
8. Urine protein test might help diagnose kidney damage from lupus, UT Southwestern researchers find
9. Bilingualism Might Begin in the Womb
10. Teens Might Exercise More If They Think Its Fun
11. Gas Cooking Might Up Your Cancer Risk
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Closely Spaced Pregnancies Might Up Autism Risk: Study
(Date:6/24/2016)... ... ... a crisis. Her son James, eight, was out of control. Prone to extreme mood shifts ... upset him, he couldn’t control his emotions,” remembers Marcy. “If there was a knife ... and say he was going to kill them. If we were driving on the ...
(Date:6/24/2016)... ... 24, 2016 , ... Global law firm Greenberg Traurig, P.A. announced that 20 ... by their peers for this recognition are considered among the top 2 percent of ... honors as members of this year’s Legal Elite Hall of Fame: Miami Shareholders ...
(Date:6/24/2016)... (PRWEB) , ... June 24, 2016 , ... Comfort Keepers® ... American Cancer Society and the Road To Recovery® program to drive cancer patients to ... and other adults to ensure the highest quality of life and ongoing independence. ...
(Date:6/24/2016)... ... 2016 , ... People across the U.S. are sharpening their pencils and honing ... contest in which patients and their families pay tribute to a genetic counselor by ... Society of Genetic Counselors (NSGC) Annual Education Conference (AEC) this September. , In ...
(Date:6/24/2016)... ... 24, 2016 , ... The Haute Beauty Network, affiliated with ... as a prominent plastic surgeon and the network’s newest partner. , Dr. ... handsome men, look naturally attractive. Plastic surgery should be invisible.” He stands by ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... FRANCISCO, Calif. , June 24, 2016 /PRNewswire/ ... ), a biopharmaceutical company developing novel therapeutics for ... unmet needs, today announced the closing of its ... of common stock, at the public offering price ... in the offering were offered by GBT. GBT ...
(Date:6/24/2016)... , June 24, 2016 The Academy of ... recommendations that would allow biopharmaceutical companies to ... entities that make formulary and coverage decisions, a move ... of new medicines. The recommendations address restrictions ... appear on the drug label, a prohibition that hinders ...
(Date:6/24/2016)... -- According to a new market research ... Safety Pen Needles), Needle Length (4mm, 5mm, 6mm, 8mm, ... Purchase (Retail, Non-Retail) - Trends & Global Forecasts to ... for the forecast period of 2016 to 2021. This ... 2021 from USD 1.65 Billion in 2016, growing at ...
Breaking Medicine Technology: