Why MEN are truly the weaker SEX
It defies all received wisdom. But, from women being less emotional (really!) to having a higher pain threshold, a new book reveals research that shows
FOR millennia it has been the dividing line in the battle of the sexes. Women may be better at multi-tasking, less susceptible to ‘man flu’ and safer behind the wheel – but, physically, men are the stronger sex.
And no wonder: on average, men are six inches taller than women and have twice the upper-body strength. Wonder Woman may be taking cinemas by storm this summer, but it’s always Superman who saves the damsel in distress.
However, this could be about to change. For a growing body of scientific study is turning centuriesold gender research on its head – by suggesting that women are, in fact, stronger than men.
‘We often think of males as being the tougher and more powerful sex,’ explains Angela Saini, author of Inferior, a ground-breaking new book which charts the scientists’ findings. ‘But strength can be defined in different ways. When it comes to the most basic instinct of all – survival – women’s bodies tend to be better equipped.’
From longevity and surviving illness to coping with trauma and managing pain, we investigate the surprising ways in which women really are the stronger sex...
ADVANTAGE GIRLS... EVEN IN THE WOMB
GIRLS’ edge over boys doesn’t just start at birth – it’s there in the womb. Scientists at the University of Adelaide say this may be because a mother’s placenta behaves differently depending on the gender of her baby.
Boys are bigger and grow faster in the womb, which can place a strain on the placenta and lead to under-nourishment of the foetus and high blood pressure in the mother. ‘With female foetuses, the placenta does more to maintain the pregnancy and increase immunity against infections,’ adds Angela Saini. ‘Why this is, nobody understands.’
PREMATURE BIRTHS A BIGGER RISK TO BOYS
BOYS are 14% more likely than girls to be born prematurely, partly as a result of this under-nourishment in the womb.
Professor Joy Lawn, a neonatologist and epidemiologist at the London School of Hygiene & Tropical Medicine, who conducted a 2013 study into premature births worldwide, says it’s the ‘biggest risk for baby boys’.
‘Even in the womb, girls mature more rapidly than boys, which provides an advantage because the lungs and organs are more developed,’ she adds.
This means male babies are less developed, which can put their early lives at risk. If a baby boy and girl get exactly the same neonatal medical care, boys are statistically 10% more likely to die.
SOB STORIES MAKE MEN CRY THE MOST
THEY may act tough, but men are more emotionally fragile.
A UK study that exposed sixyear-old boys and girls to a recording of a crying baby found that boys experienced a higher release of stress hormones.
The same researchers also said that boys cry more when upset and take longer to calm down.
A HIGHER IQ THAN ALBERT EINSTEIN
THE debate over the differences between male and female brains has raged for many years, but new research shows they’re far more alike than we imagined – and women have the upper hand.
The hippocampus, the part of the brain associated with emotions and memory, is similar-sized in both sexes. But women have more connections going from left to right across the two halves of the brain, which gives them an advantage in pulling together information from different sources and drawing logical conclusions.
Women consistently outperform men in IQ tests and the highest IQ score ever was recorded by a woman: American author Marilyn vos Savant, who, in the Eighties, got a sky-high score of 228 (far outranking Albert Einstein, between 160 and 190).
SUPER-POWERED IMMUNE SYSTEM
IT’S no surprise that adult women’s bodies have high levels of oestrogen and progesterone, the female sex hormones. But did you realise that these help to make their immune system stronger and more flexible?
A 2009 Canadian study found these hormones act against a certain enzyme which – in men – hinders the body’s defences against bacteria and viruses.
There are two reasons women need a stronger immune system. The first is evolutionary. Dr Leslie Knapp, of the University of Cambridge, says women are better equipped to fight off illness because they’re built to carry on the species: ‘Females are much more important in terms of producing offspring.’
The second explanation is biological, based on the fact that women can bear children. In very basic terms, a pregnancy is the same as foreign tissue growing inside a woman’s body. Normally, a person’s immune system would reject any such foreign matter.
But unlike men, women’s immune systems have two gears: one that can attack the bug making her sick, and another that can nurture the new tissue of a growing foetus. This flexibility makes pregnancy possible – and makes women better at battling disease.
WHY WOMEN DON’T GET ‘MAN FLU’...
IF A nasty bug does penetrate that iron-clad immune system, women still have the advantage: they fight off sickness faster.
Studies have shown that females have more white blood cells, the parts of the blood which produce antibodies – natural proteins which neutralise bacteria and viruses. Disease therefore progresses faster in men – in 12 of the 15 most common causes of death, including cancer and heart disease, men die at a much higher rate than women.
The fairer sex are even better at battling coughs and colds, suggesting ‘man flu’, that ailment which floors even the healthiest men, may actually exist.
...AND THEY’RE NOT SCARED OF DOCTORS
OF COURSE, social factors are at play, too. Not only are women biologically stronger when they’re sick, but they’re far more sensible about it. British researchers have found women are better than men at reporting poor health, and more likely to seek medical help when they first experience symptoms.
According to the UK’s National Pharmacy Association, men go to their GP four times a year compared to six times for women – and are twice as likely to take medication without reading the label.
ARE HORMONES THE KEY TO A LONG LIFE?
OF THE 43 ‘supercentenarians’ in the world – people over 110 years old – 42 are women.
Scientists haven’t pinned down the reason for this longer lifespan. However, Dr Steve Austad, a leading authority on the science of ageing, says it may be down to hormones. ‘Some research suggests that hormones given for a few weeks early in life can have huge effects,’ he explains. Studies of men who have suffered castration, thus cutting off their supply of male hormones, suggest that the earlier this happens, the longer they are likely to live.
DNA THAT’S GOT THE XX FACTOR
MEN may not be from Mars, but they do have very different DNA to women. The bundles of DNA within each of our cells are known as chromosomes. These come in pairs, and in the 23rd pair – which determines gender – women have two X chromosomes, while men have an X and a Y.
Scientists say this difference affects our health. Women, with two versions of the X chromosome, have a back-up copy in case one is faulty or goes wrong.
Men, on the other hand, have no spare if their cells malfunction or if there’s a genetic mutation on the X chromosome which causes illness or disability. ‘Mental retardation, which affects... significantly more men than women, has a strong link to the X chromosome,’ says Angela Saini.
THE PERILS OF PLAYING THE FIELD
EVEN in the animal kingdom, males are renowned for being promiscuous – and this gives the females a crucial advantage.
‘Men produce lots of sperm and don’t necessarily need to invest in their children, while women have only a couple of eggs to fertilise at a time, followed by nine months of pregnancy and many years of child-raising,’ explains Angela Saini. Therefore, women are often choosier about picking a mate, which makes their sex lives safer, as they’re less likely to sleep with a stranger or risk contracting a sexually transmitted disease.
YES, LADIES, YOU’RE BORN SURVIVORS!
IN PURE biological terms, women are better at dealing with traumatic events such as car accidents and heart attacks.
According to a 2009 study at the University of Florida, females have a higher tolerance for pain. There’s also the size factor: men tend to be bigger, so have more cells in their bodies, meaning a bigger total number of cells are likely to be damaged in a traumatic event, which slows the rate of recovery.
Dr Austad says women are, quite simply, ‘better survivors’. ‘Part of the reason there are more women than men around in ill health is to do with the fact that women have survived events that would kill men,’ he adds.
OINFERIOR: How Science Got Women Wrong – and the New Research That’s Rewriting the Story by Angela Saini (4th Estate, €13.79) is out now.