About 15 million premature babies are born every year more than 1 in 10 of the world's births and a bigger problem than previously believed, according to the first country-by-country estimates of this obstetric epidemic.

More people pull the night shift. Teens text past midnight and stumble to class at dawn. Travelers pack red-eye flights.

Questions about cost and access to birth control have been swirling for weeks now, intensifying after a Georgetown University law school student testified before congressional Democrats in support of a new federal policy to pay for contraception that she said can add up to $1,000 a year, not covered by...

More than half admitted describing someone's prognosis in a way they knew was too rosy. Nearly 20 percent said they hadn't fully disclosed a medical mistake for fear of being sued. And 1 in 10 of those surveyed said they'd told a patient something that wasn't true in the past...

The government is setting what it calls an ambitious goal for Alzheimer's disease: Development of effective ways to treat and prevent the mind-destroying illness by 2025.

The blockbuster drug Avastin should no longer be used in advanced breast cancer patients because there's no proof that it extends their lives and it presents dangerous side effects, the government declared Friday.

Unprecedented drug shortages are threatening the lives of cancer patients and other seriously ill people, and the Obama administration's plan to tackle them is but a small step toward solving a complex problem.

A new government study finds a small fraction of those teens show signs of a troubling anxiety disorder that can be mistaken for extreme shyness.