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Morning Sickness protect mom and baby

A British study says nausea and vomiting caused by “morning sickness” is nature’s way of protecting mother and baby from food poisoning.

It also shields the foetus from chemicals which can deform their organs, The London Telegraph reported.
The study, published in the Proceedings of the Royal Society Biological Sciences, says morning sickness is usually accompanied by food aversions, most commonly to meats, fish, poultry and eggs – the foods that are more likely to carry harmful micro-organisms and parasites before modern refrigeration and food-handling processes.
The newspaper says the findings backed a theory put forward six years ago by two Cornell University evolutionary biologists who suggested that morning sickness was beneficial to both mother and foetus.
Cornell Biologists Samuel Flaxman and Paul Sherman say women who experience morning sickness are significantly less likely to miscarry than women who do not.


Research at the London School of Economics indicates that physically attractive couples are 26 per cent more likely to produce daughters than sons.
The Sunday Times of London said the research citied differing “evolutionary strategies” that each sex had adopted to survive. The research claims that men have had to rely less on physical attractiveness in acquiring a mate. For men, reproductive success often depends heavily on the success and status of the father, as sons from higher standing families are in a position to inherit money to protect and invest in their offspring.

Women, however, rely much more heavily on youth and physical attractiveness in acquiring a mate, the newspaper said.

“We have shown two things,” said Dr. Satoshi Kanazawa, who led the research, “beautiful parents have more daughters than ugly parents, because physical attractiveness is heritable and because daughters benefit from attractiveness more than sons.

“We have also shown that women on average are more attractive than men, because over evolutionary history, the slight bias of beautiful parents to have more daughters has accumulated, so that girls have become more and more attractive than boys.”

The research appears in the Journal of Theoretical Biology.

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