FRIDAY, Jan. 22 (HealthDay News) -- Dalfampridine (Ampyra) extended-release tablets have been approved by the U.S. Food and Drug Administration to help adults with multiple sclerosis (MS) who have trouble walking.

FRIDAY, Jan. 22 (HealthDay News) -- Stress, history of depression, lack of social support and unintended pregnancy are among the major factors that contribute to increased risk of depression in pregnant women, a new study shows.

FRIDAY, Jan. 22 (HealthDay News) -- Environment plays an important role in the growth of young children's reading skills, a new study finds.

FRIDAY, Jan. 22 (HealthDay News) -- Minority teen boys smoke more when they suffer discrimination, but that's not the case for minority teen girls, a U.S. study finds.

FRIDAY, Jan. 22 (HealthDay News) -- Slaying orcs, charting military campaigns and gunning down bad guys might not sound like things seniors would be interested in pursuing for fun or exercise.

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

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

FRIDAY, Jan. 22 (HealthDay News) -- A new report shows the first documented link between fetal death and a mother's pregnancy-related gum disease.

FRIDAY, Jan. 22 (HealthDay News) -- New research in mice suggests that a commonly used drug combination might protect people from being infected by the AIDS virus through the major routes of transmission.

FRIDAY, Jan. 22 (HealthDay News) -- Using proteins found in llamas, researchers have produced a way to simultaneously detect seven types of neurotoxins that cause botulism.

FRIDAY, Jan. 22 (HealthDay News) -- Obesity increases the risk of developing a common and virulent form of kidney cancer, a new study finds.

FRIDAY, Jan. 22 (HealthDay News) -- A synthetic form of a naturally occurring hormone combined with chemotherapy inhibited tumor growth and achieved a 25 percent cure rate in mice with a deadly brain cancer called glioblastoma, a new study reports.

FRIDAY, Jan. 22 (HealthDay News) -- An inherited genetic trait may be linked to more aggressive cases of stomach cancer, researchers say.

FRIDAY, Jan. 22 (HealthDay News) -- If you're ready to ditch your toddler's diapers for good, the best time to start potty training may be between the second and third birthdays.

(HealthDay News) -- Carotid arteries carry blood to the brain, but they can become narrowed or clogged when sticky substances known as plaque build up in these vessels.

(HealthDay News) -- Diabetic nephropathy is damage to the kidneys that occurs from uncontrolled diabetes.