CNN Health

Ultrasound exams during pregnancy are common. And researchers have now looked at whether a diagnosis of autism spectrum disorder is more likely among children exposed to this technology in the womb.

Successful treatment of overweight and obesity in most adults is as easy and difficult as maintaining recommended diet and physical activity.

Antonio Todde was the first man in the world to live to 110, and he resided in Tiana, a village on the Italian island of Sardinia.

For athletes of all levels, endurance -- how long they can keep going at their chosen sport -- is made up of physiological and psychological factors. Physiological factors include cardiovascular fitness, and how efficient an athlete is at using energy (their "movement economy"). A critical psychological factor, on the other hand, is perceived effort, or how hard we feel we are working during an activity. The lower our perceived effort, the easier we feel that an activity is.

For athletes of all levels, endurance -- how long they can keep going at their chosen sport -- is made up of physiological and psychological factors. Physiological factors include cardiovascular fitness, and how efficient an athlete is at using energy (their "movement economy"). A critical psychological factor, on the other hand, is perceived effort, or how hard we feel we are working during an activity. The lower our perceived effort, the easier we feel that an activity is.

It starts with an uncomfortable pressure gripping the center of your chest. A sharp pain shoots through your arms, neck and jaw. Your breath starts to shorten; you feel a growing urge to vomit.

It starts with an uncomfortable pressure gripping the center of your chest. A sharp pain shoots through your arms, neck and jaw. Your breath starts to shorten; you feel a growing urge to vomit.

California's insurance commissioner has launched an investigation into Aetna after learning a former medical director for the insurer admitted under oath he never looked at patients' records when deciding whether to approve or deny care.

Cara Pressman sobbed in the big red chair in her living room. The 15-year-old tried to absorb the devastating news relayed by her parents: that their insurance company, Aetna, denied her for a minimally invasive brain surgery that could end the seizures that have haunted her since she was 9 years old.

CNN's Elizabeth Cohen reports on an investigation that was launched after former Aetna medical director admits he never looked at patient records when deciding whether to approve or deny care.

CNN's Elizabeth Cohen reports on an investigation that was launched after former Aetna medical director admits he never looked at patient records when deciding whether to approve or deny care.

Scientists from the United States and the United Kingdom have revealed, in a first-of-its-kind study, that they were able to grow human eggs in a lab. Their achievement could someday lead to new fertility treatments.

Scientists from the United States and the United Kingdom have revealed, in a first-of-its-kind study, that they were able to grow human eggs in a lab. Their achievement could someday lead to new fertility treatments.

Maryland lawmakers approved a bill that lets rape victims impregnated during an attack ask a judge to end their assailants' parental rights.

As the Winter Olympic Games officially began in South Korea on Friday, a nasty shadow was hanging over the friendly competition and expressions of goodwill -- in the form of the highly contagious norovirus.

Flu-related hospitalizations rose to about 60 people in every 100,000 during the fifth week of 2018, the US Centers for Disease Control and Prevention said in its weekly surveillance report.

Flu-related hospitalizations rose to about 60 people in every 100,000 during the fifth week of 2018, the US Centers for Disease Control and Prevention said in its weekly surveillance report.

By the time Olympic athletes arrive in Pyeongchang, South Korea, they have trained their bodies to near-perfection. But it's how well they've trained their minds that may determine who's more likely to take home a medal.

By the time Olympic athletes arrive in Pyeongchang, South Korea, they have trained their bodies to near-perfection. But it's how well they've trained their minds that may determine who's more likely to take home a medal.