There is evidence that this situation will lead to increased levels of antisocial behavior and violence and will ultimately present a threat to the stability and security of society. It has been proposed that these environmental factors also explain sex differences in mortality. However, they report a significant effect of paternal age. For example, Ruder has studied 1. Two of the often cited reviews of scientific studies on human sex ratio are by W. For example, Oster et al. In , Nawanshahr in the northern state of Punjab was notorious for its abysmal sex ratio, recording just female births for every 1, male births annually. Conversely, the entertainment , banking , tourism , fashion , and service industries may have resulted in a female-majority gender imbalance in some areas dependent on them.
In the warmest period over the years, the birth sex ratio peaked at about 1. As stated above, males usually exceed females at birth but subsequently experience different mortality rates due to many possible causes such as differential natural death rates, war casualties, and deliberate gender control. There is evidence that this situation will lead to increased levels of antisocial behavior and violence and will ultimately present a threat to the stability and security of society. The authors describe similar gender discrimination and gendercide in Congo, Kenya, Pakistan, Iraq, Bahrain, Thailand and many other developing countries. For example, Ruder has studied 1. By any token, this Act has been a failure. Gender imbalance may result in the threat of social unrest, especially in the case of an excess of low-status young males unable to find spouses,  and being recruited into the service of militaristic political factions. But in the Seventies, sex selection technologies like amniocentesis came about, in which doctors can test the amniotic fluid around a developing foetus for genetic abnormalities. The sex ratio in East Germany was also at its lowest in In all, 17 out of 29 States had either not registered any case, or had zero convictions. In the aggregated results of 56 Demographic and Health Surveys  in African countries, the ratio is 1. A research paper published by Branum et al. Qatar has the highest male ratio, with 2. These chemicals are believed to have accumulated in the tissues of fish and animals that make up the bulk of these populations' diets. This means we are killing girl children in the womb. Reported sex ratios at birth, outside the typical range of 1. Since their independence from Soviet Union, the birth sex ratio in these Caucasus countries has risen sharply to between 1. March 03, The last eight years have witnessed a radical turnaround with Nawanshahr recording female births for every 1, male births in , just shy of the naturally occurring rate of A scientific paper published by Jacobsen reported the sex ratio for , children born in Denmark between — Cold weather stressors simultaneously extend male longevity thereby raise human sex ratio in its older age bracket. For example, in the United States, as of , an adult non-elderly male is 3 to 6 times more likely to become a victim of a homicide and 2. This evens out the sex ratio of a population as it grows older. High ratios of males make it easier for women to marry, but harder for men. According to Catalano study, assuming women in East Germany did not opt to abort male more than female, the best hypothesis is that a collapsing economy lowers the human birth sex ratio, while a booming economy raises the birth sex ratio.
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Sex Ratio issue in India
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