Plastic chemicals 'may feminise boys' brains'

Chemicals used in plastics could be "feminising" the brains of baby boys, a study published today has suggested.

Research into pregnant women has shown those with a higher concentration of two phthalates in their urine produced sons less likely to play with male toys such as trucks and games like play-fighting.



The study, led by the University of Rochester Medical Centre and published in the International Journal of Andrology, examined the play of 145 pre-school children.



Phthalates are chemicals used to soften plastics and recent studies have shown that the major source of human exposure to the two phthalates of most concern - di(2-ethylhexyl) phthalate (DEHP) and dibutyl phthalate, (DBP) - is through food, the researchers said.



The study showed higher concentrations of metabolites of DEHP and DBP were associated with less "male-typical" behaviour in boys in a play questionnaire.



No other phthalate metabolites measured in the womb was linked to the less-masculine behaviour and girls' play was not associated with phthalate levels in their mothers.



Earlier studies by the lead author of the study, Professor Shanna Swan, and others have shown that phthalate exposure during pregnancy might affect the development of genitals of both male rodents and baby boys.



Commenting on the latest research, Prof Swann said: "Our results need to be confirmed, but are intriguing on several fronts."



"Not only are they consistent with our prior findings that link phthalates to altered male genital development, but they also are compatible with current knowledge about how hormones mold sex differences in the brain, and thus behaviour. We have more work to do, but the implications are potentially profound."

PROMOTED VIDEO
Life and Style
ebookNow available in paperback
Life and Style
ebooksA superb mix of recipes serving up the freshest of local produce in a delicious range of styles
Latest stories from i100
Have you tried new the Independent Digital Edition apps?

ES Rentals

    Independent Dating
    and  

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

    iJobs Job Widget
    iJobs General

    Recruitment Genius: Sales Executives - OTE £60,000

    £25000 - £60000 per annum: Recruitment Genius: Are you passionate about Custom...

    Recruitment Genius: Care Workers Required - The London Borough of Bromley

    £15000 per annum: Recruitment Genius: This homecare agency is based in Beckenh...

    Recruitment Genius: Sales Executives - OTE £50,000

    £25000 - £50000 per annum: Recruitment Genius: Are you passionate about Custom...

    Recruitment Genius: Sales Executives - OTE £50,000

    £25000 - £50000 per annum: Recruitment Genius: Are you passionate about Custom...

    Day In a Page

    Jeb Bush vs Hillary Clinton: The power dynamics of the two first families

    Jeb Bush vs Hillary Clinton

    Karen Tumulty explores the power dynamics of the two first families
    Stockholm is rivalling Silicon Valley with a hotbed of technology start-ups

    Stockholm is rivalling Silicon Valley

    The Swedish capital is home to two of the most popular video games in the world, as well as thousands of technology start-ups worth hundreds of millions of pounds – and it's all happened since 2009
    Did Japanese workers really get their symbols mixed up and display Santa on a crucifix?

    Crucified Santa: Urban myth refuses to die

    The story goes that Japanese store workers created a life-size effigy of a smiling "Father Kurisumasu" attached to a facsimile of Our Lord's final instrument of torture
    Jennifer Saunders and Kate Moss join David Walliams on set for TV adaptation of The Boy in the Dress

    The Boy in the Dress: On set with the stars

    Walliams' story about a boy who goes to school in a dress will be shown this Christmas
    La Famille Bélier is being touted as this year's Amelie - so why are many in the deaf community outraged by it?

    Deaf community outraged by La Famille Bélier

    The new film tells the story of a deaf-mute farming family and is being touted as this year's Amelie
    10 best high-end laptops

    10 best high-end laptops

    From lightweight and zippy devices to gaming beasts, we test the latest in top-spec portable computers
    Michael Carberry: ‘After such a tough time, I’m not sure I will stay in the game’

    Michael Carberry: ‘After such a tough time, I’m not sure I will stay in the game’

    The batsman has grown disillusioned after England’s Ashes debacle and allegations linking him to the Pietersen affair
    Susie Wolff: A driving force in battle for equality behind the wheel

    Susie Wolff: A driving force in battle for equality behind the wheel

    The Williams driver has had plenty of doubters, but hopes she will be judged by her ability in the cockpit
    Adam Gemili interview: 'No abs Adam' plans to muscle in on Usain Bolt's turf

    'No abs Adam' plans to muscle in on Usain Bolt's turf

    After a year touched by tragedy, Adam Gemili wants to become the sixth Briton to run a sub-10sec 100m
    Calls for a military mental health 'quality mark'

    Homeless Veterans campaign

    Expert calls for military mental health 'quality mark'
    Racton Man: Analysis shows famous skeleton was a 6ft Bronze Age superman

    Meet Racton Man

    Analysis shows famous skeleton was a 6ft Bronze Age superman
    Garden Bridge: St Paul’s adds to £175m project’s troubled waters

    Garden Bridge

    St Paul’s adds to £175m project’s troubled waters
    Stuff your own Christmas mouse ornament: An evening class in taxidermy with a festive feel

    Stuff your own Christmas mouse ornament

    An evening class in taxidermy with a festive feel
    Joint Enterprise: The legal doctrine which critics say has caused hundreds of miscarriages of justice

    Joint Enterprise

    The legal doctrine which critics say has caused hundreds of miscarriages of justice
    Freud and Eros: Love, Lust and Longing at the Freud Museum: Objects of Desire

    Freud and Eros

    Love, Lust and Longing at the Freud Museum