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:12/2/2016)... PA (PRWEB) , ... December 02, 2016 , ... ... and pharmaceutical organizations to build intelligent, connected applications, was named the best Sales ... , The winner announcement was made today by the Software & Information ...
(Date:12/2/2016)... ... December 02, 2016 , ... ‘Tis the season for giving! Today, 20 ... the National Family Partnership and the Drug Enforcement Administration as part of the National ... the 10 winning schools who decorated their campuses with this year’s Red Ribbon Week ...
(Date:11/30/2016)... Northridge, CA (PRWEB) , ... November 30, 2016 ... ... Elyson, announce that they now offer a comprehensive in-house dental plan for all ... dentists have developed a plan that gives patients a number of perks, including ...
(Date:11/30/2016)... PALMYRA, Wisconsin (PRWEB) , ... November 30, 2016 ... ... inclusion in the 2016 Deloitte Wisconsin 75, an annual ranking and recognition of ... consecutive year on the list, having ranked from 2008-2016. In addition, Standard Process ...
(Date:11/30/2016)... Chino Hills, CA (PRWEB) , ... November 30, ... ... in eating disorder and mental health treatment has announced the opening of a ... specialized residential treatment for girls with mental health issues such as severe anxiety, ...
Breaking Medicine News(10 mins):
(Date:12/2/2016)... FRANCISCO , Dec. 2, 2016  PipelineRx, a ... telepharmacy, will be offering demonstrations of its SaaS-based ... Society of Health-System Pharmacists 2016 Midyear Clinical Meeting ... Vegas . With nearly 300 hospital clients ... services and technology designed to dramatically improve pharmacy ...
(Date:12/2/2016)... December 2, 2016 On Thursday, ... honored excellence in research, development and innovation in the ... dinner was held in the presence of Sergey Tsyb, ... Russian Federation , Natalia Sanina, First Vice ... Murashko , Head of Roszdravnadzor, National Service of Control ...
(Date:12/2/2016)...  Eli Lilly and Company (NYSE: LLY ... provide updated financial guidance for 2016 on Thursday, December ... on that day with the investment community and media ... The conference call will begin at 10 a.m. ET. ... live webcast of the conference call through a link ...
Breaking Medicine Technology: