Wednesday, June 22, 2005
Research mainly on Jewish women show that 'Superbreeders' slow the ticking of biological clocks
Thirtysomething women who are nervous that their biological clock is ticking towards an infertile future were given a glimmer of hope by scientists yesterday.
They have discovered that small numbers of over 45-year-old women who are still able to conceive naturally have a genetic fingerprint that has helped to turn them into "superbreeders", capable of giving birth successfully well into middle age.
The special gene profile has been seen in Ashkenazi Jews and Bedouins of Arab descent, the leader of the team from Haddassah University hospital, Jerusalem, told the European Society of Human Reproduction and Embryology meeting in Copenhagen.
Neri Laufer said researchers would now study other ethnic groups to see whether some of them too had a genetic predisposition for pregnancies in middle age.
Dr Laufer gave most detail on the research among the Jewish women. His team studied 250 women over 45 who had conceived naturally. The women already had several children, with 80% having had six or more, and they had very few miscarriages.
"These two factors indicated to us that they had a natural ability to escape the ageing process of the ovaries," he said.
The researchers took blood samples from eight of the women, and from six others who had finished their families by the age of 30, to compare their genes. They found that the over-45s had a different gene pattern, particularly for genes involved in cell death and in DNA repair.
Most women begin to lose their fertility from the age of 30 and the chances of natural conception dive for women who are over 40.
"Cherie Blair is the lucky exception that proves the rule," said Bill Ledger of Sheffield University.
Professor Michael de Swiet, from Queen Charlotte's hospital, London, said he saw "quite a few" older mothers from the Jewish community in the capital. Overall however, women were choosing to be older mothers without being sufficiently aware of the risks to them and their babies, he said.
"In the UK, between 2000 and 2002, about 1,100 children lost their mothers because of pregnancy.
'If women delay their pregnancies till the age of 40 or more, they will have the worst recorded maternal mortality in western Europe, 35 per 100,000 maternities."
http://education.guardian.co.uk/higher/research/story/0,9865,1511889,00.html
Thirtysomething women who are nervous that their biological clock is ticking towards an infertile future were given a glimmer of hope by scientists yesterday.
They have discovered that small numbers of over 45-year-old women who are still able to conceive naturally have a genetic fingerprint that has helped to turn them into "superbreeders", capable of giving birth successfully well into middle age.
The special gene profile has been seen in Ashkenazi Jews and Bedouins of Arab descent, the leader of the team from Haddassah University hospital, Jerusalem, told the European Society of Human Reproduction and Embryology meeting in Copenhagen.
Neri Laufer said researchers would now study other ethnic groups to see whether some of them too had a genetic predisposition for pregnancies in middle age.
Dr Laufer gave most detail on the research among the Jewish women. His team studied 250 women over 45 who had conceived naturally. The women already had several children, with 80% having had six or more, and they had very few miscarriages.
"These two factors indicated to us that they had a natural ability to escape the ageing process of the ovaries," he said.
The researchers took blood samples from eight of the women, and from six others who had finished their families by the age of 30, to compare their genes. They found that the over-45s had a different gene pattern, particularly for genes involved in cell death and in DNA repair.
Most women begin to lose their fertility from the age of 30 and the chances of natural conception dive for women who are over 40.
"Cherie Blair is the lucky exception that proves the rule," said Bill Ledger of Sheffield University.
Professor Michael de Swiet, from Queen Charlotte's hospital, London, said he saw "quite a few" older mothers from the Jewish community in the capital. Overall however, women were choosing to be older mothers without being sufficiently aware of the risks to them and their babies, he said.
"In the UK, between 2000 and 2002, about 1,100 children lost their mothers because of pregnancy.
'If women delay their pregnancies till the age of 40 or more, they will have the worst recorded maternal mortality in western Europe, 35 per 100,000 maternities."
http://education.guardian.co.uk/higher/research/story/0,9865,1511889,00.html
Comments:
its very good news for the rabbishe familys .now they can pump some more kids.bring more rabbis on the world .more machlokes
Post a Comment
Comment Credit ---This article posted by 
: June 23, 2005 4:18 PM
: June 23, 2005 4:18 PM
