In Scandinavia single-embryo reintroductions are already a routine at many clinics. "The study findings will hopefully hasten developments toward the introduction of one embryo at a time in other parts of the world," says Christina Bergh.

The studies findings are being published on December 2. 2004, in the prestigious American medical journal The New England Journal of Medicine.

Brief facts about IVF/In-Vitro Fertilization In IVF eggs are taken from the woman's ovaries. The eggs are placed in a nutrient solution together with sperm. Those eggs that become fertilized can be returned to the woman and develop there into a fetus. Embryos of good quality can be preserved frozen and be transferred to the woman in the same way, after thawing.

The world's first successful IVF was carried out in the United Kingdom in 1978, and since then around one million IVF children have been born around the world. Scandinavia's first successful IVF was performed at Sahlgrenska Hospital in Gothenburg in 1982. In Sweden some 2,500 children per year are born as a result of successful IVF-treatment.

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2-Dec-2004