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Novel IVF test may cut risk of twins, triplets

Catherine McDiarmid-Watt | Monday, December 31, 2007 | 0 comments

Washington , Dec 31 (ANI): A revolutionary in vitro fertilisation (IVF) test, which may slash the risk of multiple births while increasing the chances of pregnancy, will soon be offered to British couples.

The pre-implantation genetic screening (PGS) test aims to boost the success rates when only a single
embryo is transplanted into the womb, so that multiple pregnancies may be prevented.

However, a different form of PGS is already licensed to detect chromosomal abnormalities that cause embryos to fail, but only for older patients or those with a history of miscarriage or IVF failure.

The PGS test is also controversial with almost no proof to establish the fact that it aids in conception. It was recently reported that the
British Fertility Society had recommended that its members stop using it.

In the more advanced version of PGS, around 50-100 women will be recruited. It will be conducted by
Dagan Wells, of the Reprogenetics UK clinic and the University of Oxford .

Wells is seeking permission from the
fertility regulator for the test, with a view to identifying the best embryo produced by young IVF patients aged under 35 having good prognosis.

If successful, the trial may influence many more infertile couples into opting for single embryos, corresponding to the
Human Fertilisation and Embryology Authority's strategy to cut IVF twin and triplet births from one in four to one in ten.

At present, almost 90 per cent of IVF cycles use two embryos, because clinics and couples fear that the
pregnancy rates may decline by using just one embryo.

I think this is going to be a wonderful thing for moving towards single embryo transfer. If you're only going to put back one embryo, its more important than ever that you get the best one, and that is what we think this test can do,
Times Online quoted Dr Wells as saying.

The new technique has been used on three women in America and two of them are now pregnant.

The PGS aims to identify chromosomal abnormalities called aneuploidies, which affect up to two thirds of embryos and cause implantation failure or miscarriage.

It is dependent on three new technologies, and comes with improved accuracy and lower risk.

Source:
http://www.thaindian.com/newsportal/health/novel-ivf-test-may-cut-risk-of-twins-triplets_10010842.html

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Catherine

About Catherine: I am mom to three grown sons, two grandchildren and two rescue dogs. After years of raising my boys as a single mom, I remarried a wonderful man who had never had a child of his own. Unexpectedly, I found myself pregnant at 49!
Sadly we lost that precious baby at 8 weeks, and decided to try again. Five more losses, turned down for donor egg, foster care and adoption due to my age and losses - we have accepted that there will be no more babies in our house.

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