WEDNESDAY, June 9 (HealthDay News) -- Children born to older fathers are at increased risk for non-Hodgkin's lymphoma, a new study has found.

WEDNESDAY, June 9 (HealthDay News) -- It's safe to continue giving the blood thinner warfarin to patients undergoing surgery to implant a heart pacemaker or defibrillator, according to a new study.

(HealthDay News) -- If you've broken a bone in your leg or have had surgery that involves a lower limb, crutches can help keep you moving.

(HealthDay News) -- The prospect of riding in a shopping cart may get many children excited about a trip to the grocery store.

WEDNESDAY, June 9 (HealthDay News) -- Certain types of "multitasking" brain cells (neurons) can correctly identify a wide variety of objects, ranging from cars to cats, a new study finds.

WEDNESDAY, June 9 (HealthDay News) -- Starting the school day earlier may lead to more car accidents involving teenagers, new research suggests.

WEDNESDAY, June 9 (HealthDay News) -- The diabetes drug metformin and the anti-obesity drug AICAR may help treat hepatitis C infections, although much more study is needed, British researchers report.

WEDNESDAY, June 9 (HealthDay News) -- In the year after smoke-free legislation was introduced in England, there were 1,200 fewer emergency heart attack hospital admissions -- a 2.4 percent decrease, a new study shows.

TUESDAY, June 8 (HealthDay News) -- Short people have a significantly increased risk of developing heart disease, a new analysis suggests.

WEDNESDAY, June 9 (HealthDay News) -- School friends may play a major role in your teen's academic success, a new study suggests.

WEDNESDAY, June 9 (HealthDay News) -- About three-quarters (73 percent) of Americans under the age of 65 years had some type of dental coverage in 2008, but about 45 million had no coverage, according to a new report from the U.S. National Center for Health Statistics.

WEDNESDAY, June 9 (HealthDay News) -- The novel H1N1 flu seems to share many characteristics with the seasonal flu it has largely replaced, a new study indicates.

WEDNESDAY, June 9 (HealthDay News) -- If you're a baseball coach, you might want to find out whether your pitchers consider themselves to be morning larks or night owls, because a new study suggests that their sleep preferences may affect their performance.

WEDNESDAY, June 9 (HealthDay News) -- In the war against heart disease, here's some good news from the front lines: A large study reports a 24 percent decline in heart attacks and a significant reduction in deaths since 1999 in one northern California population.

WEDNESDAY, June 9 (HealthDay News) -- The offspring of women who took the epilepsy drug valproic acid during the first trimester of pregnancy are much more likely to have serious births defects affecting the brain, heart and limbs, a new study finds.

WEDNESDAY, June 9 (HealthDay News) -- Nutrition and sun exposure are both prime influences on an individual's vitamin D level, but a new study suggests that genetics could help determine a person's risk for vitamin D deficiency.

Here are some of the latest health and medical news developments, compiled by the editors of HealthDay:

WEDNESDAY, June 9 (HealthDay News) -- The genetic background to autism may have gotten a little clearer.

(HealthDay News) -- Here are the latest clinical trials, courtesy of ClinicalConnection.com:

WEDNESDAY, June 9 (HealthDay News) -- Medicare patients in some regions of the United States spend significantly more on drugs than older folks elsewhere in the country, a new report finds.

WEDNESDAY, June 9 (HealthDay News) -- Now that oil and tar balls from the massive Gulf oil spill have begun washing up on the beaches of four states, many are wondering: What, if any, are the health risks to beachgoers and residents of the region?