Scientists have shown for the first time that it may be possible to replace a human hip or knee with a joint grown naturally inside the body using the patient's stem cells.

A fleet of 6,000 bicycles for hire will hit the streets of central London on Friday when the city's mayor Boris Johnson launches a scheme intended to fuel a cycling revolution in the congested capital.

Researchers in Japan have designed a test to identify patients who are likely to be resistant to imatinib, the standard drug for treating leukemia or cancer of the blood cells.

A decision by a U.S. appeals court could pave the way for cheaper generic forms of Eli Lilly and Co's Gemzar cancer drug to be launched in the United States beginning in mid-November.

One of every 15 New Yorkers battled bedbugs last year, officials said Wednesday as they announced a plan to fight the spreading infestation, including a public-awareness campaign and a top entomologist to head the effort.

The 24,000 New York City restaurants began showing their grades Wednesday -- A, B, or C -- under a new system of ranking sanitary conditions by the city's health department.

Safeguards to protect patients from risky drugs should have less paperwork and more consistency, drugmakers and pharmacy representatives said this week during a U.S. Food and Drug Administration meeting.

Rabbits implanted with artificial bones re-grew their own joints, complete with cartilage, researchers reported on Thursday.

Hospitals in El Salvador have been overwhelmed by an unexpected rise in respiratory diseases including pneumonia and dengue fever, health authorities said Wednesday.

When someone collapses suddenly, mouth-to-mouth rescue breathing may not be necessary and could lower the chances of survival, researchers said in two studies on Wednesday that found chest compression alone is enough.

More bystanders are willing to attempt CPR if an emergency dispatcher gives them firm and direct instructions — especially if they can just press on the chest and skip the mouth-to-mouth, according to new research.

The U.N. General Assembly asserted a global right to water and sanitation in a resolution on Wednesday, but more than 40 countries abstained, saying no such right yet existed in international law.

For weight-loss surgery, "Centers of Excellence" may not be any safer than their undistinguished peers, a study of 25 Michigan hospitals suggests.

Many older adults who were active in recreational sports like swimming and golfing can get back into the game after having a total shoulder replacement, a new study suggests.

Indian farmers are injecting a hormone sometimes given to women during childbirth into vegetables and fruits to make the produce ripen sooner and gain weight, an Indian minister has warned.

Ex-Irish president Mary Robinson urged African leaders Wednesday to boost support for maternal health, during a visit to Sierra Leone where mortality rates are among the highest in the world.

The worst smog to hit Moscow in almost a decade has sent pollution 10 times above safe levels and Russia's chief lung doctor Wednesday said residents were inhaling the equivalent of 40 cigarettes every few hours.

A nonprofit environmental group has sued the U.S. Food and Drug Administration, claiming the agency failed to regulate toxic chemicals found in "antimicrobial" soap and other personal care products.

A procedure that stops the blood supply to fibroids could be a safe and effective alternative to hysterectomy for women whose fibroid symptoms won't go away, according to a new study.

A woman's overall diet during pregnancy may not be related to her child's risk of developing wheezing problems by preschool age, a new study suggests.