Navigation Links
Male maturity shaped by early nutrition
Date:9/13/2010

EVANSTON, Ill. --- It seems the old nature versus nurture debate can't be won. But a new Northwestern University study of men in the Philippines makes a strong case for nurture's role in male to female differences -- suggesting that rapid weight gain in the first six months of life predicts earlier puberty for boys.

Males who experienced rapid growth as babies -- an indication that they were not nutritionally stressed -- also were taller, had more muscle and were stronger, and had higher testosterone levels as young adults. They had sex for the first time at a younger age and were more likely to report having had sex in the past month, resulting in more lifetime sex partners.

The researchers think that testosterone may hold the key to understanding these long-term effects.

"Most people are unaware that male infants in the first six months of life produce testosterone at approximately the same level as an adult male," said Christopher W. Kuzawa, associate professor of anthropology in the Weinberg College of Arts and Sciences and author of the study. "We looked at weight gain during this particular window of early life development, because testosterone is very high at this age and helps shape the differences between males and females."

The study provides more evidence that genes alone do not shape our fate.

"The environment has a very strong hand in how we turn out," Kuzawa said. "And this study extends that idea to the realm of sex differences and male biology."

The study found men, on average, tend to be taller and more muscular than females, and the magnitude of that difference appears to be the result of nutrition within the first six months of an infant male's life, according to the study.

"There is a perennial question about how important heredity is versus the environment as shapers of who we turn out to be," said Kuzawa. "In the last 20 years, a lot has been learned about a process calle
'/>"/>

Contact: Hilary Hurd Anyaso
h-anyaso@northwestern.edu
847-491-4887
Northwestern University
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Scientists discover ancient viral invasion that shaped human genome
2. Researchers reveal 3-D structure of bullet-shaped virus with potential to fight cancer, HIV
3. Slipper-shaped blood cells
4. New species of phallus-shaped mushroom named after California Academy of Sciences scientist
5. West Nile virus studies show how star-shaped brain cells cope with infection
6. Ancient magma superpiles may have shaped the continents
7. Early cotton planting requires irrigation
8. Girls early puberty linked to unstable environment via insecure attachment in infancy
9. Research heralds potential for early diagnosis of degenerative brain disorders
10. Genomic sequencing of marine sponge published; revealed early genetic complexity and roots of cancer
11. Exposure to early evening sunlight in spring creates teenage night owls
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/22/2015)...  Today, FreeWavz ( www.FreeWavz.com ), the developer of ... Fundable, https://www.fundable.com/freewavz . FreeWavz will be expanding ... meet customer demand. Logo - ... Invented by Dr. Eric ...
(Date:1/22/2015)... Jan. 20, 2015 NXT-ID, Inc. (NASDAQ: NXTD and ... reports on the recent success of the Wocket™ smart wallet at CES ... smart wallet was named as one of the "11 Hot Products at ... Products Launched At CES So Far" by Newseveryday.com and "The top 10 ...
(Date:1/22/2015)... 2015 Research and Markets ( http://www.researchandmarkets.com/research/wxdglm/global_wearable ... "Global Wearable Technologies Market and Applications, Opportunities, Industry ... Forecast 2014-2020" report to their offering. ... that can be worn on the user,s body ...
Breaking Biology News(10 mins):FreeWavz Launches on Fundable to Drive Speed-to-Market in 2015 2CES Response for NXT-ID's Wocket Smart Wallet Kicks Off 2015 2CES Response for NXT-ID's Wocket Smart Wallet Kicks Off 2015 3Global Wearable Technologies Market and Applications, Opportunities, Industry Analysis, Segmentation, Size, Growth, Share, Overview, Trends and Forecast 2014-2020 2
... The ferocious Tyrannosaurus rex has been depicted as the top ... and claiming the role of apex predator, much as the ... new census of all dinosaur skeletons unearthed over a large ... to have subsisted solely on the dinosaurs it tracked and ...
... to eat healthy and live sustainably have a ... environment: a Web-based tool [ http://n-print.org/sites/n-print.org/files/footprint_sql/index.html#/home ] that ... created by University of Virginia environmental scientist James ... at U.Va.; and colleagues from the Netherlands and ...
... Spanish participation, has discovered a new species of mollusc, ... The researchers say this species, which is the oldest in ... took place while it was in existence. This process could ... new species Polyconites hadriani , which was discovered in ...
Cached Biology News:T. rex more hyena than lion 2T. rex more hyena than lion 3T. rex more hyena than lion 4New free, hands-on tool supports sustainable living choices 2New free, hands-on tool supports sustainable living choices 3Oldest species of a marine mollusc discovered 2
(Date:2/27/2015)... Feb. 27, 2015   PureTech , a science ... commercializing disruptive products and technologies in the healthcare sector, ... former CEO and Member of the Board of Directors ... "It,s has been a pleasure to know Chris ... we will be working together more closely now," said ...
(Date:2/26/2015)... , Feb. 26, 2015 /PRNewswire/ - SQI Diagnostics Inc. ... life sciences company that develops and commercializes proprietary technologies ... financial and operational results for the fiscal first quarter ... release are in Canadian dollars (CAD), unless otherwise stated. ... to win new business from our existing customers and ...
(Date:2/26/2015)... , Feb. 26, 2015 DuPont Executive Vice ... driven by key research advancements and product launches across ... Bank of America Merrill Lynch 2015 Global Agriculture Conference. ... of building grain supplies the last two years, long-term ... the pace of the last decade, when demand for ...
(Date:2/26/2015)... 2015 The healthcare landscape is rapidly and radically ... Sullivan will host its 20 th Anniversary Medical ... 8 to 10, at the Hilton San Diego Resort and ... This event is a platform for global medical devices, ... disruptions and how to succeed in an uncertain future. ...
Breaking Biology Technology:Christopher Viehbacher, former CEO of Sanofi, Joins PureTech's Board of Directors 2Christopher Viehbacher, former CEO of Sanofi, Joins PureTech's Board of Directors 3Christopher Viehbacher, former CEO of Sanofi, Joins PureTech's Board of Directors 4SQI Diagnostics Reports First Quarter Financial Results 2SQI Diagnostics Reports First Quarter Financial Results 3SQI Diagnostics Reports First Quarter Financial Results 4SQI Diagnostics Reports First Quarter Financial Results 5SQI Diagnostics Reports First Quarter Financial Results 6DuPont Leader Outlines Path for Growth in Agriculture and Nutrition & Health Segments 2DuPont Leader Outlines Path for Growth in Agriculture and Nutrition & Health Segments 3DuPont Leader Outlines Path for Growth in Agriculture and Nutrition & Health Segments 4DuPont Leader Outlines Path for Growth in Agriculture and Nutrition & Health Segments 5Embrace the Future of Medical Technologies with Frost & Sullivan 2Embrace the Future of Medical Technologies with Frost & Sullivan 3
... 15 Forest,Laboratories, Inc. (NYSE: FRX ), ... to discuss aclidinium bromide clinical and pre-clinical,data findings ... webcast, which will include a slide presentation and ... 2008 at 9:30am New York time, 3:30pm CET,2:30pm ...
... Israel, May 15 Modigene Inc. (OTC,Bulletin Board: ... develop longer-acting versions of already approved,therapeutic proteins, today ... upcoming Acumen BioFin Rodman & Renshaw 5th Annual ... Central European Summer Time),on May 20, 2008., ...
... MOUNT LAUREL, N.J., May 15 MedQuist ... clinical documentation,workflow technology and services, and StructuRad ... today they have agreed to,integrate and use ... for Radiology(TM) speech recognition solution product., ...
Cached Biology Technology:Forest Laboratories, Inc. and Laboratorios Almirall, S.A. to Host Webcast to Discuss Aclidinium Bromide Data Presentations at the American Thoracic Society Annual Congress 2MedQuist and StructuRad Form Partnership to Integrate Report Macros into SpeechQ for Radiology(TM) 2
This SMAD antibody sampler pack contains 5 Polyclonal ,SMAD antibodies....
Phosphate-Buffered Saline (PBS) 7.4 (1X) liquid...
... Rat Antibody to Human CD66 ... is expressed by human neutrophils and ... carcinoma. Clone YTH71.3 reacts with transfectants ... are CEA subfamily members(2). ...
... GOAT ANTI-MOUSE IgG+IgA+IgM (H+L) ... with highly purified horseradish ... antibody has been absorbed ... fetal bovine, horse, goat, ...
Biology Products: