Stem cell study leads to breakthrough in understanding infertility

'Hidden stage of human development' is opened up by Stanford University scientists

Flu absence rate ‘abnormally high’ at Scottish school

West Lothian school remains open despite more than a quarter of pupils calling in sick, in apparent swine flu outbreak

John Crace rounds-up research news from around the globe, this week: the chimpanzees that have developed their own tool kits

Peter Tatchell: Like it or not, people under the age of 16 have sex – the current law of consent doesn't protect them, it persecutes them

Tim Worstall: GDP is not the be-all and end-all of our existence; it talks of value added to economies but has little to say about anything else

Late nights, poor diet, alcohol – starting university can be a recipe for ill-health, says Penny Anderson

Primary school pupils in Brittany told to abandon traditional Gallic greeting to avoid catching virus

Doctors call for cultural rethink on issue of couples putting off parenthood until their 30s and 40s

Expert calls for 'fertility MoTs' and more education as doctors warn over dangers of delaying parenthood

Ministers plan biggest mass immunisation in 45 years to cover all 8.5m pupils