An Icelandic company found the number of genetic mutations in children was directly related to the age of their father when they were conceived.
One prominent researcher suggested young men should consider freezing their sperm if they wanted to have a family in later life.
The research is published in Nature.
According to Dr Kari Stefansson, of Decode Genetics, who led the research, the results show it is the age of men, rather than women, that is likely to have an effect on the health of the child.
"Society has been very focused on the age of the mother. But apart from [Down's Syndrome] it seems that disorders such as schizophrenia and autism are influenced by the age of the father and not the mother."
Dr Stefansson's team sequenced the DNA of 78 parents and their children.
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It seems that disorders such as schizophrenia and autism are influenced by the age of the father and not the mother”
Dr Kari Stefansson
This revealed a direct correlation between the number of mutations or slight alterations to the DNA, of the child and the age of their father.
The results indicate that a father aged 20 passes, on average, approximately 25 mutations, while a 40-year-old father passes on about 65. The study suggests that for every year a man delays fatherhood, they risk passing two more mutations on to their child.
What this means in terms of the impact on the health of the child is unclear. But it does back studies that also show fathers are responsible for mutations and that these mutations increase with age.
And, for the first time, these results have been quantified and they show that 97% of all mutations passed on to children are from older fathers.
"No other factor is involved which for those of us working in the field is very surprising," said Dr Stefansson.
He added that the work backed other studies that have found links between older fathers and some disorders.
"The average age of fathers has been steeply rising [in industrialised countries] since 1970. Over the same period there has been an increase in autism and it is very likely that part of that rise is accounted for by the increasing age of the father," he said.
The findings should not alarm older fathers. The occurrence of many of these disorders in the population is very low and so the possible doubling in risk by having a child later in life will still be a very low risk.
Nearly all children born to older fathers will be healthy. But across the population the number of children born with disorders is likely to increase if this theory holds true.
Older fathers and therefore genetic mutations have been linked with neurological conditions because the brain depends on more genes for its development and regulation.
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Far more investigation needs to be done into the connection between genetics and autism before we can draw any reliable conclusions”
National Austistic Society spokesman
So mutations in genes are more likely to show up as problems in the brain than in any other organ. But it is unclear whether the age of fathers has an effect on any other organ or system. The research has not yet been done.
The reason that men rather than women drive the mutation rate is that women are born with all their eggs whereas men produce new sperm throughout their adult life. It is during sperm production that genetic errors creep in, especially as men get older.
Writing a commentary in the Journal Nature, Prof Alexey Kondrashov, of University of Michigan, said young men might wish to consider freezing their sperm if future studies showed there were other negative effects on a child's health.
"Collecting the sperm of young adult men and cold storing it for later use could be a wise individual decision. It might also be a valuable for public health, as such action could reduce the deterioration of the gene pool of human populations," he said.
Dr Stefansson, however, told BBC News that from a long-term perspective the decision by some men to have children later in life might well be speeding up the evolution of our species.
"The high rate of mutations is dangerous for the next generation but is generating diversity from which nature can select and further refine this product we call man," he said.
"So what is bad for the next generation may be good for our species in general."
However a spokesman for the National Autistic Society said: "While there is evidence to suggest that genetic factors may play a role in some forms of autism, there are many 'younger' fathers who have children with the condition.
"Far more investigation needs to be done into the connection between genetics and autism before we can draw any reliable conclusions."
Мне на и-мейл присылают вендоров с нашего дистрикта, различные классы, кружки, кемпы. Буду вешать сюда самое интересное ( на мой взгляд)))). Если вам что-то нужно или вы ищете, напишите. Потому что я много чего, просто, выкидываю. Вот из того, что мне было интересно...
Wholistic Learning Resources.
Тогда же была сильная волна скептицизма и фильм был назван лженаучным. Совсем недавно я его посмотрела еще раз и если вы его не видели - посмотрите))). Хотя бы для того, чтобы составить свое мнение. Мне фильм понравился, а о том что не нужно жить во зле, в проклятиях и в негативе нам говорит сам Бог. И как на нас влияет зло мы тоже знаем на своем опыте. Вот ссылка на фильм
Там же есть и вторая часть фильма, если станет вдруг интересно.
Вот та статья о которой я писала. Ставлю ее здесь, может пригодиться на будущее кому-то. Не вакцинируйтесь! Здоровья всем!
STOCKHOLM (Reuters) - Emelie is plagued by hallucinations and nightmares. When she wakes up, she's often paralyzed, unable to breathe properly or call for help. During the day she can barely stay awake, and often misses school or having fun with friends. She is only 14, but at times she has wondered if her life is worth living.
Emelie is one of around 800 children in Sweden and elsewhere in Europe who developed narcolepsy, an incurable sleep disorder, after being immunized with the Pandemrix H1N1 swine flu vaccine made by British drugmaker GlaxoSmithKline in 2009.
Finland, Norway, Ireland and France have seen spikes in narcolepsy cases, too, and people familiar with the results of a soon-to-be-published study in Britain have told Reuters it will show a similar pattern in children there.
Their fate, coping with an illness that all but destroys normal life, is developing into what the health official who coordinated Sweden's vaccination campaign calls a "medical tragedy" that will demand rising scientific and medical attention.
Europe's drugs regulator has ruled Pandemrix should no longer be used in people aged under 20. The chief medical officer at GSK's vaccines division, Norman Begg, says his firm views the issue extremely seriously and is "absolutely committed to getting to the bottom of this", but adds there is not yet enough data or evidence to suggest a causal link.
Others - including Emmanuel Mignot, one of the world's leading experts on narcolepsy, who is being funded by GSK to investigate further - agree more research is needed but say the evidence is already clearly pointing in one direction.
"There's no doubt in my mind whatsoever that Pandemrix increased the occurrence of narcolepsy onset in children in some countries - and probably in most countries," says Mignot, a specialist in the sleep disorder at Stanford University in the United States.
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