Navigation Links
Having Twin Sister Boosts Men's Anorexia Risk
Date:12/3/2007

Shared fetal environment may be to blame, researchers say

MONDAY, Dec. 3 (HealthDay News) -- Males with a twin sister are more likely than other males to develop the eating disorder anorexia nervosa, scientists say.

The finding supports the theory that exposure to female sex hormones in the womb may be associated with increased risk for anorexia nervosa, note British and Canadian researchers.

"Anorexia nervosa is approximately 10 times more common in females than in males. The reasons for this difference is not known, and it is likely that their unraveling will represent an important step forward in the understanding of the etiopathogenetic factors involved in the development of eating disorders," Marco Procopio, of the University of Sussex in England, and Paul Marriott, of the University of Waterloo in Canada, wrote as background information in their study.

They analyzed data from a study of Swedish twins born between 1935 and 1958 and found that, overall, female twins were more likely than male twins to develop anorexia nervosa.

The exception was among males with a fraternal (dizygotic) twin sister. The risk level of these males was not statistically different than that of females from such a twin pair.

Among 4,478 fraternal opposite-sex twins, 20 females and 16 males had anorexia nervosa as defined by narrow criteria, and 32 females and 27 males had anorexia nervosa as defined by broader criteria.

"A plausible explanation for this phenomenon is that in pregnancies bearing a female fetus, a substance is produced, probably hormonal, that increases the risk of having anorexia nervosa in adulthood," the study authors wrote. "Because the male half of an opposite-sex twin pair would also be exposed to this substance, it could account for the observed elevated risk in males with female twins. The most likely candidates are sex steroid hormones."

The study appears in the December issue of the Archives of General Psychiatry.

More information

The American Academy of Family Physicians has more about anorexia nervosa.



-- Robert Preidt



SOURCE: JAMA/Archives journals, news release, Dec. 3, 2007


'/>"/>
Copyright©2007 ScoutNews,LLC.
All rights reserved

Related medicine news :

1. Researchers estimate about 9 percent of US children age 8 to 15 meet criteria for having ADHD
2. More reports of children having trouble falling asleep than maintaining sleep
3. Overweight mothers run greater risk of having hyperactive children
4. New Survey Finds that over Half of MRSA Patients Report Having Received No Information about the Disease from Health Care Providers
5. Having Lots of Kids Helps Dads Live to 100
6. Nine Questions to Help You Protect Your Heart Before Having Surgery
7. College Mental Health Expert and Sister of Student Who Died By Suicide Available to Discuss College Mental Health Issues
8. The Sisters of Charity Health System Awards Four Nursing Scholarships in Ohio and South Carolina
9. Terrell Herring Honored by Big Brothers Big Sisters
10. Sister Red Cross Societies Help Each Other
11. New treatment boosts muscle function in myasthenia gravis
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/28/2017)... ... April 28, 2017 , ... From April 30 to ... Care Medicine will host industry leaders for the annual spring Convention & Expo, ... the industry adapt to the issues currently affecting urgent care and on-demand healthcare. ...
(Date:4/28/2017)... (PRWEB) , ... April 28, 2017 , ... ... are conducting a pilot study of ActiGraph’s CentrePoint Data Hub in ... a leading provider of clinical-grade wearable activity and sleep monitoring solutions for the ...
(Date:4/28/2017)... ... April 28, 2017 , ... Rob Lowe is a popular ... has leant his presence to an educational purpose as the host of the “Informed” ... being cancer. In a recent episode, the series focuses on thyroid cancer. , Although ...
(Date:4/27/2017)... ... 2017 , ... Healthcare companies are trying to meet talent shortages and find ... executive resume. , “If you’re a healthcare executive open to new opportunities this year ... as ready as you are for a new job search. I’ve heard from countless ...
(Date:4/27/2017)... (PRWEB) , ... April 27, 2017 , ... Goodcents Deli ... open in the Lincoln, Neb. area this year. , The first new location ... The second location will open at 84th and Northern Lights Drive this fall. And ...
Breaking Medicine News(10 mins):
(Date:4/19/2017)... 19, 2017 The Mobile X-Ray product segment is ... CAGR during the forecast period Mobile X-Ray segment ... digital mobile X-Ray devices market, which is estimated to be ... at a CAGR of 7% over the forecast period. Mobile ... more than US$ 100 Mn in 2017 over 2016. The ...
(Date:4/19/2017)... 19, 2017 The Global Effective Microorganisms ... 2022 report has covered and analysed the potential of Global ... market size, shares and growth factors. The report identifies and ... opportunities in the global market. ... Browse 152 Tables and Figures, 6 Major Company Profiles, ...
(Date:4/19/2017)... THOUSAND OAKS, Calif. , April 19, 2017 ... premium industrial buildings it is developing at Conejo ... California , to Atara Biotherapeutics, Inc. ... patients with severe and life-threatening diseases that have ... focus on allogeneic T-cell therapies for cancer, autoimmune ...
Breaking Medicine Technology: