Babies born in winter are bigger, brighter and more successful

The weather may be gloomy but the outlook is sunny for boys and girls who arrive now, major new research reveals

For centuries astrologers have sworn that the time of year a baby is born plots the course its life will take. Now extensive research conducted over a seven-year period appears to prove that babies born in the winter are more likely to grow into big, bright and successful adults than their summer counterparts.

The study, which will be published this week, was led by scientists at Harvard University and monitored the development of 21,000 boys and girls worldwide. It shows that there were large seasonal variations when it came to weight, length, height, head size and mental ability.

Researchers believe that the effects on the pregnant mother and the growing foetus of seasonal variations in diet, hormones, temperature, exposure to sunlight and viruses and other infections may influence a baby's characteristics.

The American and Australian psychiatrists and anthropologists from Harvard and Queensland universities measured the children and carried out mental and motor tests at birth, at eight months, and at four and seven years.

Compared to summer births, those born in winter were significantly longer at birth, and were heavier, taller and had larger head circumference at age seven. They also had higher scores in a series of intelligence exercises. By the age of seven, winter- and spring-born children were 210g heavier, 0.19cm taller, and had head circumferences significantly larger than summer and autumn-born children. The results also show that babies born in the winter were the longest, while winter- and spring-borns weighed the most at the age of seven and were also the tallest.

The researchers, whose work appears this week in the medical journal Schizophrenia Research, conclude: "The overall pattern of findings is that winter/spring babies are both 'bigger' on the anthropometric variables and 'smarter' on the selected neurocognitive variables."

The new study is the latest - and largest - in a series of projects worldwide aimed at evaluating the effect of the seasons on human health, longevity and physical and intellectual development. In 2002, scientists at Germany's prestigious Max Planck Institute for Demographic Research announced that people born in the autumn live longer than those born in spring, and do not become as ill in old age.

Studying census data from Denmark, Austria and Australia, the institute also revealed a seasonal link to life expectancy for those older than 50. In Austria, for example, it was found that adults born between October and December lived some seven months longer that those born between April and June.

Dietary changes and seasonal infections are thought to be at the heart of the phenomenon. "A mother giving birth in spring spends the last phase of her pregnancy in winter, when she will eat fewer vitamins," said Gabriele Doblhammer, one of the scientists who carried out the research. "When she stops breast-feeding and starts giving her baby normal food, it is in the hot weeks of summer - when babies are prone to infections of the digestive system."

The season of birth can also influence whether a person is an optimist or pessimist. Yet it is the summer's babies that have a brighter outlook than winter-born grumblers.

The American and Australian researchers offer a number of explanations for such differences in the early years of life. One theory is that foetal exposure to changing seasonal factors such as temperature, rainfall and ultraviolet radiation may be responsible.

News
news

Lincoln MP Karl McCartney 'denied all knowledge' of the Twitter activity

News
Michael Buerk in the I'm A Celebrity jungle 2014
people
News
The author PD James, who died on 27 November 2014
people

Detective novelist who wrote Death comes to Pemberley passed away peacefully at her home, aged 94

Arts and Entertainment
Joel Edgerton, John Turturro and Christian Bale in Exodus: Gods and Kings
filmDirector said film would 'never have been financed' with ethnic minority actors in key roles
PROMOTED VIDEO
News
ebooksNow available in paperback
Life and Style
tech
News
people
Life and Style
tech Manband spurn Spotify to stream album exclusively with Google
News
Irradiated turkey and freeze dried mash potato will be on the menu this thanksgiving
video
News
Andy Murray with his girlfriend of nine years, Kim Sears who he has got engaged to
peopleWimbledon champion announces engagement to girlfriend Kim Sears
Latest stories from i100
Have you tried new the Independent Digital Edition apps?
Independent Dating
and  

By clicking 'Search' you
are agreeing to our
Terms of Use.

iJobs Job Widget
iJobs General

Recruitment Genius: Part Time Telesales / Appointment Maker

£10000 - £15000 per annum: Recruitment Genius: A professional telesales/appoin...

Recruitment Genius: Senior Execution Trader

£30000 - £250000 per annum: Recruitment Genius: A global Rolling Spot FX, Comm...

Austen Lloyd: Clinical Negligence Associate / Partner - Bristol

Super Package: Austen Lloyd: BRISTOL - SENIOR CLINICAL NEGLIGENCE - An outstan...

Recruitment Genius: Domestic Gas Service / Breakdown Engineer - Stafford / Stoke

£27000 - £33000 per annum: Recruitment Genius: Domestic Gas Service and Breakd...

Day In a Page

Cameron, Miliband and Clegg join forces for Homeless Veterans campaign

Cameron, Miliband and Clegg join forces for Homeless Veterans campaign

It's in all our interests to look after servicemen and women who fall on hard times, say party leaders
Millionaire Sol Campbell wades into wealthy backlash against Labour's mansion tax

Sol Campbell cries foul at Labour's mansion tax

The former England defender joins Myleene Klass, Griff Rhys Jones and Melvyn Bragg in criticising proposals
Nicolas Sarkozy returns: The ex-President is preparing to fight for the leadership of France's main opposition party – but will he win big enough?

Sarkozy returns

The ex-President is preparing to fight for the leadership of France's main opposition party – but will he win big enough?
Is the criticism of Ed Miliband a coded form of anti-Semitism?

Is the criticism of Miliband anti-Semitic?

Attacks on the Labour leader have coalesced around a sense that he is different, weird, a man apart. But is the criticism more sinister?
Ouija boards are the must-have gift this Christmas, fuelled by a schlock horror film

Ouija boards are the must-have festive gift

Simon Usborne explores the appeal - and mysteries - of a century-old parlour game
There's a Good Girl exhibition: How female creatives are changing the way women are portrayed in advertising

In pictures: There's a Good Girl exhibition

The new exhibition reveals how female creatives are changing the way women are portrayed in advertising
UK firm Biscuiteers is giving cookies a makeover - from advent calendars to doll's houses

UK firm Biscuiteers is giving cookies a makeover

It worked with cupcakes, doughnuts and macarons so no wonder someone decided to revamp the humble biscuit
Can SkySaga capture the Minecraft magic?

Can SkySaga capture the Minecraft magic?

It's no surprise that the building game born in Sweden in 2009 and now played by millions, has imitators keen to construct their own mega money-spinner
The King's School is way ahead of the pack when it comes to using the latest classroom technology

Staying connected: The King's School

The school in Cambridgeshire is ahead of the pack when it comes to using the latest classroom technology. Richard Garner discovers how teachers and pupils stay connected
Christmas 2014: 23 best women's perfumes

Festively fragrant: the best women's perfumes

Give a loved one a luxe fragrance this year or treat yourself to a sensual pick-me-up
Arsenal vs Borussia Dortmund: Alex Oxlade-Chamberlain celebrates century with trademark display of speed and intuition

Arsenal vs Borussia Dortmund

The Ox celebrates century with trademark display of speed and intuition
Billy Joe Saunders vs Chris Eubank Jnr: When two worlds collide

When two worlds collide

Traveller Billy Joe Saunders did not have a pampered public-school upbringing - unlike Saturday’s opponent Chris Eubank Jnr
Homeless Veterans Christmas Appeal: Drifting and forgotten - turning lives around for ex-soldiers

Homeless Veterans Christmas Appeal: Turning lives around for ex-soldiers

Our partner charities help veterans on the brink – and get them back on their feet
Putin’s far-right ambition: Think-tank reveals how Russian President is wooing – and funding – populist parties across Europe to gain influence in the EU

Putin’s far-right ambition

Think-tank reveals how Russian President is wooing – and funding – populist parties across Europe to gain influence in the EU
Tove Jansson's Moominland: What was the inspiration for Finland's most famous family?

Escape to Moominland

What was the inspiration for Finland's most famous family?