Navigation Links
Baby boys are more likely to die than baby girls
Date:3/24/2008

Male infants in developed nations are more likely to die than female infants, a fact that is partially responsible for mens shorter lifespans, reveals a new study by researchers from University of Pennsylvania and University of Southern California.

The paper, which will be published online in the Monday, March 24 edition of the Proceedings of the National Academy of Sciences, analyzes 15 countries spanning three continents and hundreds of years. It finds that the gender gap in infant mortality was as high as 30 percent at its peak around 1970.

The disparity has narrowed in recent decades due to medical advancements that have helped more baby boys survive, specifically, caesarean sections and the spread of intensive care units for premature babies, the study found.

The marked reversal of historical trends indicates that at an age when males and females experience very similar lives, they are very different in their biological vulnerability, but how different depends on environmental and medical conditions, said corresponding author Eileen Crimmins, associate dean and professor at the USC Davis School of Gerontology.

In the 20th century the leading causes of infant death shifted from infectious diseases such as diarrheal diseases to congenital conditions and complications of childbirth and premature delivery, according to the study.

Boys are 60 percent more likely to be premature and to suffer from conditions arising from being born premature, such as respiratory distress syndrome. They are also at a higher risk of birth injury and mortality due to their larger body and head size.

The spread of intensive care units for infants has especially favored the survival of small and premature baby boys, the research found, because boys were more vulnerable across a range of weights. Since 1970, the percentage of deliveries by c-section has grown from an average of 5 percent to more than 20 percent. C-sections are also 20 percent more common for males.

The 15 countries analyzed include Sweden, France, Denmark, England/Wales, Norway, The Netherlands, Italy, Switzerland, Finland, the United States, Spain, Australia, Canada, Belgium and Japan.


'/>"/>

Contact: Suzanne Wu
suzanne.wu@usc.edu
213-740-0252
University of Southern California
Source:Eurekalert

Related biology news :

1. Unfavorable ocean conditions likely cause of low 2007 salmon returns along West Coast
2. New study shows low-fat diets more likely to reduce risk of heart disease than low-carb diets
3. Coral reefs unlikely to survive in acid oceans
4. Journal Sleep: Insomniacs are more likely to report a family history of the sleep disorder
5. Girls who begin dieting twice as likely to start smoking
6. Youre likely to order more calories at a healthy restaurant
7. Adolescent girls with ADHD are at increased risk for eating disorders, study shows
8. U of M research finds disordered eating less common among teen girls who regularly eat family meals
9. Family conditions may affect when girls experience puberty
10. Girls prefer pink, or at least a redder shade of blue
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/22/2016)... 2016 http://www.researchandmarkets.com/research/4lmf2s/global_behavioral ... the  "Global Behavioral Biometric Market 2016-2020" ... http://www.researchandmarkets.com/research/4lmf2s/global_behavioral ) has announced the ... Market 2016-2020"  report to their offering. ... http://www.researchandmarkets.com/research/4lmf2s/global_behavioral ) has announced the addition ...
(Date:1/21/2016)... 21, 2016 --> ... market research report "Emotion Detection and Recognition Market by Technology ... (Facial Expression, Voice Recognition and Others), Services, Application ... to 2020", published by MarketsandMarkets, the global Emotion ... USD 22.65 Billion by 2020, at a CAGR ...
(Date:1/20/2016)...   MedNet Solutions , an innovative SaaS-based eClinical ... research, is pleased to announce the attainment of record-setting ... result of the company,s laser focus on (and growing ... it,s comprehensive, easy-to-use and highly affordable cloud-based technology platform. ... MedNet growth achievements in 2015 include: , ...
Breaking Biology News(10 mins):
(Date:2/4/2016)... 4, 2016 ContraVir Pharmaceuticals, Inc. (NASDAQ: ... and commercialization of targeted antiviral therapies, announced today that ... 2016, to be held February 8-9, 2016, at the ... Disruptive Growth & Healthcare Conference, taking place in ... James Sapirstein , Chief Executive Officer of ...
(Date:2/4/2016)... ... ... Many of the engineers at FireflySci, Inc. have been manufacturing quartz and ... cuvette manufacturers is their supercharged customer service and their extensive database of glass cuvette ... of inside information, they have recently revamped their manufacturing techniques to reduce lead times ...
(Date:2/3/2016)... 3, 2016 Harvard Apparatus Regenerative Technology, ... developing bioengineered organ implants for life-threatening conditions of ... CEO Jim McGorry , will present at ... on Tuesday, February 9, 2016 at 8:00 am ... . HART,s presentation will be webcast live and ...
(Date:2/3/2016)... Milpitas, Calif. (PRWEB) , ... February 03, 2016 ... ... supply chain events annual report which summarizes and analyzes nearly 750 ... global event monitoring, alert, and analysis service. , Supply chain risk management ...
Breaking Biology Technology: