WEDNESDAY, Dec. 15 (HealthDay News) -- A group that accredits many U.S. hospitals has urged hospital and emergency-room caregivers to watch for attempted suicides occurring in their facilities -- even in patients with no history of psychiatric problems.

(HealthDay News) -- Children can behave aggressively as they learn how to appropriately express their emotions.

(HealthDay News) -- A bruise forms when a ruptured blood vessel causes blood to pool below the skin.

WEDNESDAY, Dec. 15 (HealthDay News) -- U.S. scientists have pinpointed more than 2,000 genetic regions that play a crucial role in early human development.

WEDNESDAY, Dec. 15 (HealthDay News) -- People's happiness doesn't necessarily increase as their income rises, a new study suggests.

WEDNESDAY, Dec. 15 (HealthDay News) -- Attending Alcoholics Anonymous meetings at least once a week increases the likelihood that jailed women and those recently released from jail can recover from alcohol abuse, researchers have found.

WEDNESDAY, Dec. 15 (HealthDay News) -- Making families wait for a second exam to confirm a brain death diagnosis is not only unnecessary but may make it less likely that the family will agree to donate their loved one's organs, a new study finds.

WEDNESDAY, Dec. 15 (HealthDay News) -- Genes that predict length of survival and help guide treatment for patients with non-small cell lung cancer have been identified by U.S. researchers.

WEDNESDAY, Dec. 15 (HealthDay News) -- Elderly hospital patients who get back on their feet as quickly as possible spend less time in the hospital than those who remain in bed, finds a new study.

WEDNESDAY, Dec. 15 (HealthDay News) -- Starting school at a younger age may reduce girls' risk of becoming obese years later, a new study suggests.

WEDNESDAY, Dec. 15 (HealthDay News) -- The death rate from cardiovascular disease in the United States has declined 28 percent since the late 1990s, but heart disease and stroke still account for one-third of all deaths, a new study finds.

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

WEDNESDAY, Dec. 15 (HealthDay News) -- In a rare case, a man living in Germany who had both leukemia and AIDS no longer has any detectable HIV cells in his blood following a stem cell transplant for his leukemia three years ago.

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

WEDNESDAY, Dec. 15 (HealthDay News) -- U.S. Food and Drug Administration advisers urged the agency to take a new look at data that may indicate potential safety problems with dental fillings that include mercury.

WEDNESDAY, Dec. 15 (HealthDay News) -- Each year in the United States some 48 million people, or one in every six Americans, are sickened by the food they eat, according to two federal health reports issued Wednesday.

WEDNESDAY, Dec. 15 (HealthDay News) -- U.S. health authorities Wednesday intensified pressure on makers of dietary supplements, warning individuals or companies marketing "tainted" products that they could face criminal prosecution, among other consequences.

WEDNESDAY, Dec. 15 (HealthDay News) -- A ban on drop-side cribs announced Wednesday by the U.S. government comes after millions of recalls and the deaths of more than 30 infants and toddlers in the past decade.

WEDNESDAY, Dec. 15 (HealthDay News) --Premenopausal women who carry excess fat around their abdomen or have a large waist relative to their hip size may face a higher risk for breast cancer that is estrogen receptor (ER)-negative, new research reveals.