HIV warning to women using injectable contraception

World Health Organisation advises use of condoms for protection against infection

Chemo in pregnancy does not necessarily harm baby, says study

Children born to women undergoing cancer drug treatment show normal results in physical and mental development tests

Women with diabetes warned to take precautions when having a baby

Diabetic mothers-to-be have high risk of giving birth to children with congenital abnormality, study says

Cancer campaigners say levels of fat, salt and sugar in food must be reduced

Health researchers claim maintaining healthy lifestyle and eating well could prevent as many as a third of all cancers

Tax and regulate sugar like alcohol and tobacco, urge scientists

Sugar is as toxic to the liver as alcohol and is at the root of obesity and certain types of liver disease, claim US scientists

Why I’m off for some vitamin D – until the sun comes out

Ann Robinson: Vitamin D deficiency is being linked with sudden infant deaths and fractures in children. Is it time to start taking supplements?

Mayo Clinic plans to sequence patients’ genomes to personalise care

Project will give doctors the genetic information they need to choose drugs that work best and minimise side effects

Rhys Morgan: ‘They are trying to silence me’

A 17-year-old schoolboy from Cardiff is proving an unlikely but effective opponent of powerful organisations pushing miracle cures for serious diseases

Stillbirth exhibition reveals a devastating loss

An extraordinary photographic exhibition raises awareness of the UK's shockingly high rate of stillbirth – a subject so taboo that few like to talk of it

Should we put lithium in the water?

A psychiatrist in Ireland has suggested that putting psychiatric medicine in drinking water could cut the suicide rate