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Science News for June 26, 2000


Europe leads the world for IVF treatment

The report reveals big variations between countries, with France, Germany, and the UK carrying out more than half of all IVF treatments. Scandinavian countries and the Netherlands have the highest availability of IVF treatment, resulting in a significant number of children being born through IVF.

Lasers to the aid of embryos

Researchers are using lasers to aid embryonic development by precision-drilling the 'shell' of human eggs. This technique has shown improved IVF success rates and increased implantation rates, allowing embryos to embed themselves in the womb more effectively.

Mortality rates are lower after surgery when an anesthesiologist directs anesthesia care

A study of 217,000 Medicare patients found that mortality rates were significantly lower for patients whose anesthesia was directed by an anesthesiologist. The researchers found that higher nurse-to-bed ratios, larger hospital size, and direct involvement of the anesthesiologist were independently associated with better patient survival.

SourceChildren's Hospital of Philadelphia·JournalAnesthesiology·DateJun 26, 2000

Why is silicon so brittle?

Scientists use quantum mechanical simulations to explain silicon's fracture anisotropy, which shows cracks prefer certain crystallographic directions. The simulations reveal a key difference in bond breaking behavior between easy and difficult propagation directions.

SourceMax-Planck-Gesellschaft·JournalPhysical Review Letters·DateJun 26, 2000