Menu
Science blog
Map of the universe years in the making
Rogue bug may cause IVF failure
Technology decodes Alhambra inscriptions
Sonar causes deafness in dolphins
GM stem cells treat autoimmune disease
Nickel crash kick-started evolution
GPS inhalers track asthma triggers
Urban design turning kids off being active
Cleaning up oil spills can be bad for fish
Fluoro sensors to monitor recycled water
First cloned camel born in Dubai
Cephalopods share common toxic armoury
New evidence of aspirin risk for elderly
Salmonella vaccine could come from space
Porpoise-like sub swims with the current
Microbes thrive on iron under the ice
Blinking tower lights could save birds
Tradition can curb climate change: meeting
Coolest brown dwarf in universe found
'Silent' heart attacks quite common: study
World's land slipping in quality
Warning over 'natural' menopause therapies
Complex life pushed back in time
Lice may suppress asthma, allergies
  Genetic link between period onset and BMI
A large group of studies have found genetic links between body mass index and the onset of menarche.

Molecular geneticist Dr Scott Wilson from the University of Western Australia, co-author of one study published today in the journal Nature Genetics, says it is the first to reveal the genes that influence the start of menarche - the onset of menstruation in females.

He says that while the age of menarche is influenced by the environment, it is also known to be partly controlled by genetics.

But the specific gene variants associated with the onset of menstruation have been unclear until now.

Using high tech 'gene chips', the scientists looked for clusters of women that had similar gene codings and started menarche at the same age. Gene chips take a DNA sample and look for variations at specific points, known as SNPs, associated with menarcheal age.

As well as determining the genes linked to early menarche the study also investigated the link between menarchael age and BMI.

Previous epidemiological studies have shown that early menstruation is linked to higher body fat and shorter stature. Wilson and colleagues found that of the 10 known genetic variants associated with BMI, eight were also linked to SNPs known to influence the age of menarche.
Other functions

Wilson says further study of the genes may reveal their role in reproductive disorders.

"The next step of the work will be to look at the precise function of the genes," he says.

"Do they have a role in later reproductive life and fertility as well as age at menarche? Could they have a role in the onset of menopause? "

Professor Peter Rogers, Director of the Centre for Women's Health Research at Monash University in Melbourne, says the study identifies a series of genes we didn't previously know were associated with the age of menarche.

"Now medical biologists can better understand how processes like menstruation and menopause work," he says.
Common thread

Also published in Nature Genetics are four independent studies that found that a gene known as 28Linb plays a role in age of menarche.

Dr Rob Norman, Director of the Centre for Reproductive Health at the University of Adelaide, says it's amazing that four papers from different population groups identified the same gene as being responsible.

"Often these genome wide scans come from different populations and they come up with different answers," he says.
Roads kill more than malaria: study
Seagrass link to seahorse upright posture
Black band disease hits Great Barrier Reef
Hobbit feet reignite debate
Lizards soak up sunshine vitamin
Canada sequences swine flu virus
Termites are a miner's best friend
'Hide and seek' costly to HIV
Giant trilobites had complex social lives
Midnight sun too much for some
More toxics added to 'dirty dozen' list
Rogue galaxies prompt rethink on Newton
Acupuncture relieves back pain: study
Blazars shed light on black hole physics
Unfaithful offspring get head start
Daydreamers might solve problems faster
Coal supply may be vastly overestimated
Science and unis are winners in the budget
Heartbeat key for blood growth in embryos
Neck pain worse for women in the office
Busty figurine a 'Paleolithic Playboy'
Plant cells help bees get a grip
Space trio to give sharper view of cosmos
Sea creatures inspire CO2 sponge
Genetic link between period onset and BMI
Researchers find bacteria in clouds
Sustainable farm research 'under threat'
Tree leaves monitor pollution levels
Menu
Stay upright during labour, say experts
Antarctic ice growth linked to ozone hole
Fires fuelling global warming: study
Methane climate shock 'less likely'
Genome map reveals cow's genetic makeup
Microbe bubble machine stores energy
Stress gives reef fish wonky ears
Swine flu remains a mystery
Perception is in the ear of the beholder
Solar wind gives asteroids a tanning
Researchers find grain's memory gene
PET bottles potential health hazard
Researchers find first common autism gene
Fossil fuel use must fall to 25%: study
'WaveRider' poised for hypersonic flight
Big cuttlefish 'at risk' from desalination
Glaciers show north-south climate divide
Mobile phones help cardiac rehab
Dancing birds feel the beat
Mushrooms may yield vitamin D bonanza
Dingoes may be a native's best friend
Dud treatments more easily spread
U2 comet dust predates solar system
Australian CO2 delay sends 'mixed message'
Visit Statistics
http://google.com/

http://bing.com/

https://gepatit-info.top/

https://serdechnic.com/

https://buy-meds24.com/

https://dverirespekt.ru/

https://www.sribno.net/

https://undergroundcityphoto.com/

https://detskiezabolevaniya.com/

http://grafaman.ru/

http://innoslicon.com/html/product/index.htm

https://yginekologa.com/

https://yes-com.com/

https://www.baikaleminer.com/

https://bitmaein.com/shop

https://www.artdeko.info/

https://aerodizain.com/

http://xn--d1abj0abs9d.in.ua/

http://lider82.ru/

http://sta-grand.ru/

http://snabs.kz/

https://sky-mine.ru/

https://rybalka-opt.ru/

http://snegozaderzhatel.ru/

https://xn--e1aaajzchnkg.ru.com/

http://hit-kino.ru/

http://www.regionshop.biz/

https://xn--80aaafbn2bc2ahdfrfkln6l.xn--p1ai/

https://pp-budpostach.com.ua/

https://vykup-avto-krasnodar.ru/

https://gcup.ru/

https://mega-polis.biz.ua/

http://vanrise.com.ua/

http://infra-e.ru/