Experts warned that the unequal sex ratio could fuel the emergence of a society dominated by single people who encouraged aggressive competition to find a mate, a power struggle in the form of war or the emergence of sex tourism.
Nature provides a comparison of the biological standard of rigid gender as much as 104-106 males for every 100 women. Any significant differences from a narrow range can only be explained by factors that are abnormal.
In India and Vietnam, the ratio of women and men the figure is about 112 boys for every 100 girls. In China, nearly 120 boys to 100 girls and in some places there are even higher than 130 boys.
And this trend is increasingly spreading. In the South Caucasus region such as Azerbaijan, Georgia and Armenia, the ratio of its birth more than 115 boys to 100 girls and remained as such up to the west, Serbia and Bosnia.
Experts from France Christophe Guilmoto population have called 'an alarming demographic masculinization'. The consequences of this phenomenon in countries like India and China as a result of abortion remains unclear.
But many experts believe that the lack of adult women who experienced at this time will have an impact in the next 50 years as the impact of climate change.
Global awareness of the problem was revived in 1990 through an article Nobel laureate Indian economist, Amartya Sen with the title of the famous 'More Than 100 Million Women Are Missing'.
In the article it is explained that the low ratio of women at this time due to the traditional choices of boys, decreased fertility, and the most important is the emergence of inexpensive technology to determine the sex before birth.
A total of an estimated half a million female fetuses are aborted every year in India, according to a study by the British medical journal, The Lancet.
"In the past, villagers had to go into town to get a sonogram (ultrasound). Now, the sonographer was the one who went to the villages to serve people who want to have boys," said Poonam Muttreja, executive director of the non-profit foundation Population Foundation in India as quoted by The Sydney Morning Herald, Friday (10/28/2011).
How changes that may be realized to solve this problem is still hotly debated. Some people estimate the increase in polyandry and sex tourism. While others predict the emergence of a disaster due to the excess of men in society will lead to the murder of sex, violence and conflict are considered legitimate.
Political scientist Valerie Hudson and Andrea den Boer, has announced this concern several years ago. They wrote that the Asian countries by the number of men who are too much will cause a security threat in Western countries.
"The high ratio of sexes in society can only be ruled by authoritarian regimes capable of suppressing violence at home and exporting it abroad through colonization or war," said Hudson and Boer.
Mara Hvistendahl, a correspondent for Science magazine and author of Unnatural Selection which was recently published, says that fears of a full-scale war is not unfounded and India remains a developing country democracies, despite the very high gender imbalance. But he agrees with the underlying argument.
"Historically, a society where men outnumber women is not a pleasant place to live. They are often unstable and violent," he said.
UN agencies have issued similar warnings about the relationship between the scarcity of women, increased sex trade and the movement of marriage. Meanwhile, several solutions have been offered. Abortion is illegal in China and India, but officials say that the law is very difficult to enforce.
"There is no ultimate weapon. In some countries in Eastern Europe, people really do not realize what was happening," said Guilmoto.
He believes the first priority is to ensure that this problem actually published, not only in developing countries alone. In advanced countries in Europe and America does have a comparison of the number of women more than men.
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