Bookmark Kaumudi Online  Bookmark this site  Editor@Kaumudi  |  Marketing  Print Advt rates  |  Calendar 2018        Go!    
 
 
July 23, Monday 2018 1:08 PM       

       HEADLINES: Dileep interrupting trial, government for special court                                              Five dead in fire at suburban building in Himachal Pradesh                                              Gunman dead after shooting nine, including girl, in Toronto: Canadian police                                              Trump warns Iran to never threaten U.S.                                              Key to Root's ODI success was picking Kuldeep from his hand: Tendulkar                                              Bumrah's surgery in England ‘not a great success’, fitness before Tests in doubt                                              Kaumudi Facebook
       WEIRDNEWS Next Article: Cyberbullied teen commits suicide in front of family  
       Caesarean births impacting human evolution: study
 
         Posted on :19:04:10 Dec 6, 2016
   
A A
       Last edited on:19:04:10 Dec 6, 2016
         Tags: Caesarean births impacting human evolution: s
 
LONDON: Regular use of caesarean sections to deliver babies is affecting the human evolution, according to a new study.
 
An increasing number of mothers now need surgery to deliver a baby due to their narrow pelvis size, researchers said.
 
They estimate cases where the baby cannot fit down the birth canal have increased from 30 in 1,000 in the 1960s to 36 in 1,000 births today.
 
Historically, these genes would not have been passed from mother to child as both would have died in labour.
 
According to Dr Philipp Mitteroecker from the University of Vienna in Austria, there is a long standing question in the understanding of human evolution.
 
"Why is the rate of birth problems, in particular what we call fetopelvic disproportion - basically that the baby does not fit through the maternal birth canal - why is this rate so high?" he said.
 
"Without modern medical intervention such problems often were lethal and this is, from an evolutionary perspective, selection.
 
"Women with a very narrow pelvis would not have survived birth 100 years ago. They do now and pass on their genes encoding for a narrow pelvis to their daughters," said Mitteroecker.
 
It has been a long standing evolutionary question why the human pelvis has not grown wider over the years.
 
The head of a human baby is large compared with other primates, meaning animals such as chimps can give birth relatively easily, 'BBC News' reported.
 
Researchers devised a mathematical model using data from the World Health Organisation (WHO) and other large birth studies.
 
They found opposing evolutionary forces. One is a trend towards larger newborns, which are more healthy.
 
However, if they grow too large, they get stuck during labour, which historically would have proved disastrous for mother and baby, and their genes would not be passed on.
 
"One side of this selective force - namely the trend towards smaller babies - has vanished due to caesarean sections," said Mitteroecker.
A A
       WEIRDNEWS
Next Article: Cyberbullied teen commits suicide in front of family
 
 
WEIRDNEWS HEADLINES
Climbing chariots & touching trinity a crime: SJTA  
Nobel laureate Liu Xiaobo's widow leaves China  
Semen can cause Ebola virus disease  
UN slams Trump over child detentions  
Candidates with varicose veins unfit to join armed forces:HC  
Sexual intimacy in late years does not slow memory loss  
Twitterati goes berserk over Kanye West's new 'poop' song  
Ajinomoto helps improve Thailand's food industry  
Man bites off brother's nose after denied money for alcohol  
Alive man in Uttar Pradesh declared 'dead' on paper  
UP: Man's severed foot kept between his legs in Sultanpur hospital  
Gender: Female; Name: Miss Unwanted  
UP: Man performs last rites for his pet parrot  
Madhya Pradesh: Dead man came alive  
Delhi college students protest after semen-filled balloons thrown at girls  
Drunk man survives after biting and killing snake  
MLAs fear spirits haunting Rajasthan Assembly, demand 'yagya'  
Couple gets grandchildren via surrogacy  
Divorce petition filed against dog, goat marriage  
TN: Priests suspended for decorating idol in 'salwar kameez'  
80-year-old woman raped in Pune  
Doctor commits suicide after wife denies him non-veg food  
Modern-day Mowgli: Village boy forges bond with gang of monkeys  
263 coins, shaving blades and needles removed from man's stomach in MP  
Man claims sexual stimulation cleared his sinus  
 
Do you support women's entry in Sabarimala?
Yes
 
No
 
Don't Know
 
 
 
Home Kerala India World Business Sports Sci&Tech Education Automobile CityNews Movies Environment Letters 
© Copyright keralakaumudi Online 2011  |  Reproduction in whole or in part without written permission is prohibited.
Head Office Address: Kaumudi Buildings, Pettah P.O, Trivandrum - 695024, India.
Online queries talk to Deepu Sasidharan, + 91 98472 38959 or Email deepu[at]kaumudi.com
Customer Service -Advertisement Disclaimer Statement   |  Copyright Policy