Cell discovery hope for jet lag

Fertile forties pregnancy warning
Experts fear older women are ditching contraception in the mistaken belief that fertility inevitably wanes at a certain age.

Exercise 'can cut gallstone risk'
Doing lots of exercise drastically cuts the risk of developing painful gallstones, UK researchers have found.

Genes reveal 'biological ageing'
Scientists say they have pinpointed gene variants that might show how fast people's bodies are ageing.

Premature birth gene clue found
DNA differences which appear to affect the risk of giving birth early have been found by US scientists.

Artificial pancreas diabetes hope
Scientists have shown that an "artificial pancreas" can be used to regulate blood sugar in children with Type 1 diabetes.