By Letitia Rowlands From: The Daily Telegraph December 01, 2011 5:49AM

AFTER Tracy Britton experienced the heartache of miscarriage for the fifth time, she began to doubt she would ever become a mother.

 

"It's very hard physically as well as emotionally to want something so bad, but your body keeps failing you," she said.

Eleven weeks ago Tracy, 38, and husband Paul Jensen welcomed son Bill thanks to an IVF genetic screening technique helping couples become parents.

Microarray comparative genomic hybridisation, or CGH, involves a full chromosome count of embryos and allows doctors to ensure only the healthiest embryos are implanted.

Fertility clinic Genea will today release data showing almost nine out of 10 patients aged under 38 whose embryos underwent CGH achieved a pregnancy with a foetal heartbeat seen at seven weeks gestation.

The data, to be presented at the World Congress on Human Reproduction in Melbourne this week, shows a success rate of 65 per cent for women older than 38.

Fertility specialist Dr Devora Lieberman said random chromosome abnormalities were one of the main causes of failed IVF cycles and of repeated miscarriages in women who conceive naturally.

By using CGH, only embryos containing the correct number and sequence of chromosomes were considered.

Dr Liberman said CGH, which adds about $3000 cost to a cycle of IVF treatment, was not recommended for all IVF patients.

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