Nine women in Sweden have successfully received transplanted wombs donated from relatives and will soon try to become pregnant, the doctor in charge of the pioneering project has revealed.

The women were born without a uterus or had it removed because of cervical cancer. Most are in their 30s and are part of the first major experiment to test whether it's possible to transplant wombs into women so they can give birth to their own children.

A jolt of caffeine can boost memory, according to a study published Sunday that provides a scientific motive for students slurping coffee, tea or energy drinks when cramming for exams.

A team at Johns Hopkins University in Baltimore, Maryland, found that caffeine enhances certain memories for at least a day after they were formed.

India on Monday marked three years since its last polio case was reported, a major milestone in eradicating the crippling disease.

The marker puts the country on course to being formally declared polio-free in March. The World Health Organization stills need to confirm there are no undetected cases before making the official declaration.

A 58-year-old Utah woman is expecting a baby she is carrying for her daughter, with plans to give birth to her own granddaughter, reports said Friday.

Julia Navarro, a Peruvian who lives in the western U.S. state, agreed to be implanted with one of her daughter Lorena McKinnon's fertilized eggs after the 32-year-old had a string of miscarriages.

Fifty years ago, almost half of Americans smoked cigarettes -- at work, in restaurants, schools and even in hospitals. Then came a landmark warning that changed everything.

The Surgeon General's report on smoking and health, issued January 11, 1964, was the first of its kind to alert the public that cigarettes caused lung cancer and other fatal tumors.

Lung cancer rates in the United States are falling as a direct result of efforts to control smoking and other tobacco use, according to research published on Thursday.

The decline affects both men and women, said data from the Centers for Disease Control and Prevention (CDC), reported in the organization's Morbidity and Mortality Weekly Report.

A closely-watched prototype therapy to inject corrective genes into the brain to treat Parkinson's disease has cleared an important safety hurdle, doctors said Friday.

Tested on 15 volunteers with an advanced form of the degenerative nerve disease, the technique proved safe and the results were encouraging, they said.

Teenage shoe-shiner Amit contracted polio as a toddler, leaving him with damaged legs and a twisted spine. He has never seen a doctor and the country's eradication of the disease came too late for him.

On Monday, India will mark three years since its last polio case, leaving it on the cusp of being declared free of the ancient scourge in what is arguably its, and one of the world's, biggest health success stories.

Japan's health ministry said Friday it was probing claims falsified data was used in an Alzheimer's disease study involving major pharmaceutical firms, a day after filing an unrelated criminal complaint against Swiss drugs giant Novartis.

Health officials said they were questioning researchers after being told false data was used in clinical testing for the $28 million government-backed Alzheimer's study, aimed at improving diagnosis of the disease.

The French drug safety agency has approved commercial sales of a medicine derived from cannabis for the first time in France.

France's Health Ministry said in a statement Wednesday that sales of Sativex, produced by Britain's GW Pharmaceuticals, will be allowed for the treatment of muscle spasms associated with multiple sclerosis.