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Latest Sex ratio Stories

2013-10-08 11:41:12

Modern ultrasound technology and economic pressure leads to female fetuses in the Ballabgarh area of northern India being aborted more often than male fetuses. Additionally, girls up to the age of five die more frequently than boys, which results in a gender imbalance in the area, according to Anand Krishnan, MD and doctoral candidate at Umeå University, who defends his thesis on 11 October. Anand Krishnan has completed work on the dissertation in an area called Ballabgarh Health and...

Mammals Choose Sex Of Their Babies To Promote Life
2013-07-11 12:57:38

Lee Rannals for redOrbit.com - Your Universe Online Mammals are able to "choose" the sex of their offspring in order to beat the odds and produce extra grandchildren, according to a study published in the journal PLoS ONE. Researchers analyzed 90 years of breeding records from the San Diego Zoo, helping to prove for the first time what has been a fundamental theory of evolutionary biology. Scientists have theorized before that mammals rely on some unknown physiologic mechanism to...

More Female Bats Born When Spring Comes Early
2012-05-07 03:14:01

First long-term study shows birthdate determines if bat men are outnumbered There must be something in the warm breeze. A study on bats by a University of Calgary researcher suggests that bats produce twice as many female babies as male ones in years when spring comes early. The earlier in the spring the births occur, the more likely the females are to survive and then reproduce a year later, as one-year olds, compared to later-born pups, according to Dr. Robert Barclay's research...

2012-04-16 22:21:08

Mothers born in India but living in Canada are significantly more likely to have male babies for their second and third births compared with women in Canada, found a new study of male:female ratios in CMAJ (Canadian Medical Association Journal). "Our findings raise questions about why there are more male liveborns than female liveborns among Indian couples who have had two or more previous babies," states Dr. Joel Ray, St. Michael's Hospital and University of Toronto. Researchers from...

Turtles' Mating Habits Protect Against Effects Of Climate Change
2012-01-26 04:48:31

The mating habits of marine turtle may help to protect them against the effects of climate change, according to new research led by the University of Exeter. Published Jan 25 in the journal Proceedings of the Royal Society B, the study shows how the mating patterns of a population of endangered green turtles may be helping them deal with the fact that global warming is leading to a disproportionate number of females being born. The gender of baby turtles is determined by the temperature of...

2012-01-12 21:37:35

University of Minnesota research finds sex ratios influence financial decisions The perception that women are scarce leads men to become impulsive, save less, and increase borrowing, according to new research from the University of Minnesota's Carlson School of Management. "What we see in other animals is that when females are scarce, males become more competitive. They compete more for access to mates," says Vladas Griskevicius, an assistant professor of marketing at the Carlson School...

2012-01-09 13:17:11

Females influence the gender of their offspring so they inherit either their mother's or grandfather's qualities. 'High-quality' females — those which produce more offspring — are more likely to have daughters. Weaker females, whose own fathers were stronger and more successful, produce more sons. The study, by scientists at the University of Exeter (UK), Okayama University and Kyushu University (Japan), is published today (9 January) in the journal Ecology Letters. It shows...

2011-03-14 15:09:14

In the next 20 years in large parts of China and India, there will be a 10% to 20% excess of young men because of sex selection and this imbalance will have societal repercussions, states an analysis in CMAJ (Canadian Medical Association Journal) (pre-embargo link only) http://www.cmaj.ca/embargo/cmaj.101368.pdf A preference for sons in China, India and South Korea combined with easy access to sex-selective abortions has led to a significant imbalance between the number of males and females...

2010-12-22 19:16:00

Most Australians do not approve of IVF or abortion for sex-selection purposes, and most do not think a hypothetical blue or pink pill to select the sex of a child should be legal, a new study has found. The study, led by Dr Rebecca Kippen from the School of Population Health at the University of Melbourne, analysed responses from more than 2,500 people participating in the Australian Survey of Social Attitudes, combined with a series of in-depth parental interviews. The survey found that 69...

2010-08-09 14:58:38

"Love stinks!" the J. Geils band told the world in 1980, and while you can certainly argue whether or not this tender and ineffable spirit of affection has a downside, working hard to find it does. It may even shorten your life. A new study shows that ratios between males and females affect human longevity. Men who reach sexual maturity in a context in which they far outnumber women live, on average, three months less than men whose competition for a mate isn't as stiff. The steeper the...


Word of the Day
pungle
  • To take pains; labor assiduously with little progress.
This word comes from the Spanish 'pongale,' put it.
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