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Working conditions during pregnancy influence health of the child
March 24, 2010
Working conditions during pregnancy influence health of the child
Scientists warn that working conditions of the pregnant woman can affect weight of the child at a birth or lead to premature birth. Isabelle Niedhammer and its colleagues from University College (Dublin, Ireland) have studied working conditions of 676 women during the period from 14 till 16 weeks of pregnancy.
Researchers interested, the working day of the woman how many lasts, whether it is necessary it to work on changes, to overwork, strain physically. It has appeared that a combination at least two adverse factors (time or contract work, processing, the replaceable schedule, physically an arduous toil) raises risk of premature birth or low weight at a birth approximately five times.
«Physically the arduous toil most strongly influences weight at a birth, raising risk of a birth of the child with weight 2500 г or less», – speaks Isabelle Niedhammer. Long labour shifts also raised risk of a birth of the child with weight less than 3000 г and risk of chronic diseases in the future.
About 25 % of the women participating in research, have informed that they should work more than 40 hours per week, 20 % worked on changes, 18 % named the work physically strained.
Authors of research conclude that the further researches about influence of working conditions on a pregnancy outcome are necessary.
On materials Reuters Health.
Diet may influence the sex of your unborn child
September 27, 2008
Diet may influence the sex of your unborn child
Experience has shown that in mice, diet, which adheres to the mother before conception may influence the sex of her unborn child. The study shows that mice, which gave drugs, decreases blood sugar significantly more often produced by the light of young females than males.
This discovery confirms the traditional beliefs, which state that if there are certain products that can affect the sex of offspring.
According to popular belief, a crucial role in determining the sex of the child plays the father of semen. But with time scientists find more and more evidence that the mother is also something that depends. For example, previously published papers stating that single mothers often are born girls.
Elissa Cameron of the University of Pretoria (South Africa) and her colleagues decided to see how changes in diet influences sex ratios – the proportion of females and males in this population.
To do so, they help dexamethasone (DEX), steroids, which prevents the ingress of glucose in the blood system, changed the level of sugar in the blood of mice females during fertilization.
Evolutionary advantage
Scientists give 20 female mice water with the addition of DEX for the first three days after they were admitted to males. After that mice given clean water. Several times during the experiment Cameron colleagues measured the levels of sugar in the blood of these mice, as well as 20 blood specimens from the control group.
The average level of glucose in the blood of mice receiving DEX, fell from 6.47 to 5.24 millimol per liter. Researchers found that 53% of young specimens of the control group were males, while among the offspring of mice receiving DEX, such was only 41%.
As it is lowering blood sugar leads to greater per cent of the female progeny, remains unclear. However, it seems that the opposite is true. Previous experience, in which the mouse-Diabetics showed that rodents with high blood sugar give more males than expected.
Biologists suggested that the mother suffers stress or health problems to light often appear young female, because it gives evolutionary advantage: a weak male born to a mother’s sick, can hardly find a pair, and female, no matter how weak it is was likely to bring more offspring.
The rate of the state
“It seems that blood sugar levels can actually speak indicator of whether the mother is in good shape or bad,” – said Ruth Mace of University College London (Britain). Previously, Mays published work, in which it finds that, subject to the shortage of food the mother with a large muscle mass more likely to produce light males.
The idea that diet affects sex ratios, have already joined the People’s practice. According to folk tradition, if a family wants a boy, the mother should have more red meat and salty foods, but if a girl – it must be nalegat for fish, vegetables, chocolate and candy.
“It’s interesting, because the meat for a long period increases the blood sugar level, while the sweet dishes dramatically increase this figure, but briefly, followed by a sharp decline in the level of glucose”, – said Cameron.