A troublingly high number of U.S. patients who are given angiograms to check for heart disease turn out not to have a significant problem, according to the latest study to suggest Americans get an excess of medical tests.

Men are more likely than women to be interested in sex, have sex and enjoy sex, according to new scientific research, which also found people who stay active and healthy enjoy longer sex lives.

Children inherit about 30 mutated genes from each parent, fewer than had been thought, but enough in at least one case to pass on inherited illnesses, according to a first detailed look at the blueprint for human life in a family.

Too many pregnant women who want to avoid a repeat cesarean delivery are being denied the chance, concludes a government panel.

The Food and Drug Administration said Wednesday a nerve stimulating implant from Medtronic failed to significantly reduce seizures in epilepsy patients.

Pregnancy-related deaths appear to have risen nationwide over the past decade, nearly tripling in the state with the most careful count - California.

The United Nations says mother-to-child HIV transmission can be eliminated by 2015 if health programs receive increased investments as planned.

The virus that causes AIDS can hide in the bone marrow, avoiding drugs and later awakening to cause illness, according to new research that could point the way toward better treatments for the disease.

Germs in the gut may help drive appetite, says new research into the link between obesity and bacteria.

Diet not working? Blame your genes. That's the pitch behind a new test that claims to show whether people will do better on a low-fat or a low-carb weight loss plan.

For the first time, an experimental drug has extended the lives of men with advanced prostate cancer who are no longer responding to other treatments and are out of options for fighting the disease, a company-led study found.

New advice from the American Cancer Society puts a sharper focus on the risks of prostate cancer screening, emphasizing that annual testing can lead to unnecessary biopsies and treatments that do more harm than good.

Ignoring the health risks of heavy cell phone use invites a cancer epidemic, supporters of a bill requiring manufacturers to put labels on mobile phones and packaging said Tuesday.

What if you could be fat but avoid heart disease or diabetes? Scientists trying to break the fat-and-disease link increasingly say inflammation is the key.