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In practice it is difficult for women over 45 to find private clinics willing to treat them, even withdonated eggs, because of low success rates and regulations requiring doctors to consider the welfare of any children that might be born.
However, Lord Harries of Pentregarth, the former Bishop ofOxford and now the interim chairman of the Human Fertilisation and Embryology Authority, said recently that women in their fifties should not be banned from IVF and called for the welfare of the childrequirement to be eased as part of the Government review of fertility laws.
Most women over 50 who have IVF babies, such as Dr Patricia Rashbrook, who became Britain's oldest mother when she gave birthat 63 in July, use donated eggs and get treatment abroad.
However, egg freezing techniques are improving and some scientists believe women will soon have the option of "putting motherhood on ice"until their fifties.
The new study, to be presented at the American Society for Reproductive Medicine conference in New Orleans tomorrow, is thought to be the first to evaluate the abilities of mothersin their fifties.
Dr Anne Steiner, of the University of Southern California, the report's lead author, said: "Older parents adapt to parenting in a similar fashion as their younger counterparts. Thephysical and mental capacities of these women should not be considered an early impediment to child rearing."
She compared a group of 49 women who had babies after their 50th birthdays using donated...
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