FRIDAY, Sept. 2 (HealthDay News) -- It would be hard, these days, not to have heard that regular exercise can provide innumerable health benefits and help people enjoy longer, happier and more active lives.

FRIDAY, Sept. 2 (HealthDay News) -- Joining a gym is the first step for many people interested in losing weight or getting in better shape. But for many, joining is also the last step they take, said Drew Baker, general manager of the West Salem Courthouse Athletic Club in Salem, Ore.

(HealthDay News) -- Ectopic pregnancy occurs when the egg begins to develop outside the womb. In this type of pregnancy, the fetus cannot grow normally and does not survive.

(HealthDay News) -- Low-dose aspirin therapy helps lower the risk of heart attack in many people, but it isn't for everyone.

FRIDAY, Sept. 2 (HealthDay News) -- A trend toward a longer allergy season may mean more sneezing, sniffling and misery for allergy sufferers, experts say.

FRIDAY, Sept. 2 (HealthDay News) -- A rapid rise in hookah use in California is cause for concern, researchers say.

FRIDAY, Sept. 2 (HealthDay News) -- College students can avoid gaining the dreaded "freshman 15" pounds by maintaining a healthy lifestyle from day one, an expert says.

FRIDAY, Sept. 2 (HealthDay News) -- A boy's relationship with his mother changes as he grows up and the way it changes can affect his behavior when he's a teen, a new study says.

FRIDAY, Sept. 2 (HealthDay News) -- Children's social goals help determine how they respond to being bullied and whether their responses are effective, researchers say.

FRIDAY, Sept. 2 (HealthDay News) -- The ability to remember the origin of memories isn't fully developed until adulthood, a new study says.

FRIDAY, Sept. 2 (HealthDay News) -- At age 36, Charles Ruma had a wife, young son and a successful career as a home builder. His diagnosis with testicular cancer came as a shock.

FRIDAY, Sept. 2 (HealthDay News) -- Having weight loss surgery before breast reduction surgery is best for severely obese women who have both procedures, according to a small new study.

FRIDAY, Sept. 2 (HealthDay News) -- Traffic safety should be among a child's first lessons for the new school year, experts suggest.

FRIDAY, Sept. 2 (HealthDay News) -- Drunk and drugged drivers make the Labor Day weekend one of the most dangerous times to be on the road in the United States, so federal and local officials are conducting a crackdown on impaired drivers.

FRIDAY, Sept. 2 (HealthDay News) -- Climate change may increase children's asthma-related visits to hospital emergency departments in the next decade.

THURSDAY, Sept. 1 (HealthDay News) -- First responders and workers at the World Trade Center site right after 9/11 continue to suffer an excess of physical and mental ills, including a possible increase in their risk for cancer.

FRIDAY, Sept. 2 (HealthDay News) -- Researchers using scanning technology say they discovered physical differences in the brains of older children with autism compared to those of kids without autism.

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

FRIDAY, Sept. 2 (HealthDay News) -- A kit to diagnose seasonal influenza, bird flu and other forms of flu that affect people has been approved by the U.S. Food and Drug Administration.

FRIDAY, Sept. 2 (HealthDay News) -- Experts at the U.S. Centers for Disease Control and Prevention are investigating two recent cases of swine flu in which the new strain of flu passed directly from pigs to children.