TUESDAY, Feb. 15 (HealthDay News) -- Alcohol appears to cause more sleep problems in women than in men, a new study found.

(HealthDay News) -- Kids playing in the yard may be easily distracted and not notice an oncoming car. Busy drivers may also be focused elsewhere and not notice a child in danger.

(HealthDay News) -- Vitamin D is essential for healthy bones and teeth. According to the American Academy of Family Physicians, it can also help protect against chronic disease, including diabetes, heart disease and cancer.

TUESDAY, Feb. 15 (HealthDay News) -- Medical imaging tests are often ordered by doctors to protect themselves against a lawsuit, a new study suggests.

TUESDAY, Feb. 15 (HealthDay News) -- Teenagers, generally not renowned for their good eating habits, tend to have healthier weights and snacking habits when they start the day with breakfast, researchers report.

TUESDAY, Feb. 15 (HealthDay News) -- Stress fractures linked to overuse may be more common than thought among high school athletes, especially among those who participate in running-related sports, a new study finds.

TUESDAY, Feb. 15 (HealthDay News) -- Posting calorie counts of menu items at fast-food restaurants doesn't appear to inspire teenagers and parents of younger children to order less-fattening meals, new research finds.

MONDAY, Feb. 14 (HealthDay News) -- Obese men face a dramatically higher risk of dying from a heart attack, regardless of whether or not they have other known risk factors for cardiovascular disease, a new study reveals.

TUESDAY, Feb. 15 (HealthDay News) -- Some adults may want to take a lesson from young children who've demonstrated that even at the early age of 3, children have a sense of what's fair, researchers say.

TUESDAY, Feb. 15 (HealthDay News) -- In women with bipolar disorder, premenstrual mood changes are associated with more depressive episodes and more severe symptoms, researchers have found.

TUESDAY, Feb. 15 (HealthDay News) -- Motorcycle helmets reduce the risk of spine injuries, says a study that challenges a widely held belief that the weight of motorcycle helmets increases the risk of neck injuries.

MONDAY, Feb. 14 (HealthDay News) -- A mini exercise bike that can be used while working at a desk could help improve the health of office workers and others with sedentary jobs, according to a new study.

TUESDAY, Feb. 15 (HealthDay News) -- Multiple sclerosis is associated with reduced levels of an important neurotransmitter, noradrenaline -- a shortage caused by damage to an area of the brain called the locus coeruleus (LC), researchers have found.

TUESDAY, Feb. 15 (HealthDay News) -- People who take drugs called bisphosphonates to prevent bone loss may also reduce their risk of developing colorectal cancer by almost 60 percent compared to those not on the drugs, a new study suggests.

TUESDAY, Feb. 15 (HealthDay News) -- Preventing heart attacks and strokes is very similar in women and men, with a few small but important differences, according to new guidelines from the American Heart Association.

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

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

TUESDAY, Feb. 15 (HealthDay News) -- People whose blood levels of bilirubin are on the high side may have a lowered risk for lung cancer, chronic obstructive pulmonary disease (COPD) and death from any cause, British researchers report.

TUESDAY, Feb. 15 (HealthDay News) -- Men with prostate cancer may be twice as likely to have started showing signs of male pattern baldness at the age of 20 than those without prostate cancer, a new French study suggests.

TUESDAY, Feb. 15 (HealthDay News) -- After leaving the hospital for treatment of three common conditions, older black people are more likely to be readmitted within 30 days than older white people, a new study finds.

TUESDAY, Feb. 15 (HealthDay News) -- Men who have a low prostate-specific antigen (PSA) score when they're first tested may not need to be screened annually and probably don't need to undergo a biopsy, a new study suggests.

TUESDAY, Feb. 15 (HealthDay News) -- A review of data from 15 trials suggests that the zinc supplements so many Americans pop at the first sign of a cold may, in fact, cut the length and severity of illness.