13 March 2014, 01:00 PM ET
A 46 year-old woman in Texas likely acquired HIV from her female partner in what health officials say is a rare case of female-to-female transmission of the virus.
13 March 2014, 11:42 AM ET
You've probably heard it all your life: Eating sweets will rot your teeth. But while a diet high in sugar certainly promotes the formation of cavities (as well as other medical problems), sugar itself isn't the real culprit behind tooth decay.
13 March 2014, 09:45 AM ET
12 March 2014, 03:56 PM ET
Angelina Jolie made headlines when she revealed she'd had a double mastectomy last year. But her cancer-prevention surgeries are not over yet, the actress said recently.
12 March 2014, 03:15 PM ET
The search continues for the 239 passengers and crew of Malaysia Airlines Flight 370, which disappeared somewhere off the coast of Southeast Asia. Assuming the plane crashed over the ocean, how long could survivors continue to live in the open seas?
12 March 2014, 12:51 PM ET
A device that resembles a headband for preventing migraine headaches has been approved by the Food and Drug Administration, but how does it work?
12 March 2014, 12:36 PM ET
A growing percentage of adults in the United States are taking medications such as Adderall for attention-deficit/hyperactivity disorder, according to a new report.
12 March 2014, 12:00 PM ET
A widely publicized set of studies that demonstrated a simple way to generate stem cells that could develop into body tissues or placenta has drawn skepticism over its credibility.
12 March 2014, 12:00 PM ET
Researchers have identified a bacterial imbalance in the intestinal tissue of Crohn's disease patients.
12 March 2014, 11:41 AM ET
Scientists put five-second rule to the test.
12 March 2014, 10:27 AM ET
Imagine a world in which everyone is empowered to take charge of their own health care by discovering their personal genetic risk factors. That's the vision of Anne Wojcicki, founder and CEO of the personalized gene-testing company 23andMe.
12 March 2014, 02:39 AM ET
So we can learn a lot about how the brain works by studying people who have specific difficulties, for example those who have had a brain injury, or who develop dementia.
12 March 2014, 02:33 AM ET
Heroin is an opiate drug and a high potential for abuse.
11 March 2014, 03:07 PM ET
A young adult's personality may hold clues to his or her health later in life, so perhaps doctors should assess their patients' personalities during checkups, a new study says.
11 March 2014, 12:51 PM ET
One woman's uncommon ability to fight her HIV infection may provide new insights for developing a vaccine that triggers a special immune response against the viral disease, researchers said.
11 March 2014, 10:53 AM ET
A woman who complained of a rapidly expanding waistline was actually suffering from a mucus-filled, 88-lb. ovarian cyst, a new case report reveals.
11 March 2014, 09:28 AM ET
For people with knee osteoarthritis, taking the supplement glucosamine may not decrease the loss of knee cartilage or pain, at least in the short term, new study finds.
11 March 2014, 09:16 AM ET
After doctors initially missed a pregnancy complication, a woman gave birth to a healthy baby girl that was growing outside her uterus, in her abdomen.
10 March 2014, 06:30 PM ET
Girls born with a low birth weight may be at increased risk for fertility problems as adults, a new study from Sweden suggests.
10 March 2014, 04:00 PM ET
Bullying is associated with suicidal thoughts in youth, a new study finds.
10 March 2014, 08:02 AM ET
Parents are often completely engrossed in their mobile phones while sharing a meal with their children, researchers report.
10 March 2014, 03:06 AM ET
A simple laser scan could quickly identify pathogens in food and in the environment.
07 March 2014, 07:50 PM ET
Thomas Cook just celebrated the proud milestone of 25 years with a donated heart.
07 March 2014, 04:44 PM ET
Obese teenagers who don't get an adequate amount of sleep are more likely to develop certain diseases.
07 March 2014, 02:53 PM ET
If you buy a smart pedometer or fitness tracker like a Fitbit, chances are it will encourage you to take 10,000 steps a day. But do you really have to walk this much to be healthy?
07 March 2014, 02:11 PM ET
Fitness trackers can get dirty, sweaty or smelly, especially if you wear them on the wrist while exercising. Here's what you need to know to clean almost any fitness band, quickly and effectively.
07 March 2014, 12:48 PM ET
Coupons for fresh produce are hard to find, but there are ways to save money when buying your fruit and vegetables.
07 March 2014, 11:59 AM ET
Offering free contraception won't exactly lead to free love, it turns out. A study of women using free contraception shows they did not show an increase in risky sexual behavior over time.
07 March 2014, 11:30 AM ET
One state ranks first in both frequent exercise and vegetable consumption, according to a new Gallup-Healthways poll.
07 March 2014, 11:14 AM ET
A new Gallup-Healthways poll ranks states by the percentage of people who say they exercise three times a week for at least 30 minutes.
07 March 2014, 09:12 AM ET
Women who give birth to 10 or more children may have a reduced risk of cancer, a new study from Finland suggests.
07 March 2014, 09:02 AM ET
A new way of printing a 3D liver replica may guide surgeries, preventing complications. The new technique could also be used to guide face transplants and other complicated operations.