When It Comes to Sex Partners, Men Prefer Younger Women: Study

TUESDAY, Sept. 30, 2014 (HealthDay News) -- In books and movies, plots involving older men chasing much younger women abound.

 Can Exercise Prevent Type 2 Diabetes? Your Genes May Be Key

TUESDAY, Sept. 30, 2014 (HealthDay News) -- For millions of overweight Americans, regular exercise remains a prime weapon against excess weight and the threat of type 2 diabetes.

 Fish Oil Supplements Have Little Effect on Irregular Heartbeat: Study

TUESDAY, Sept. 30, 2014 (HealthDay News) -- High doses of fish oil supplements won't prevent the return of a common type of irregular heartbeat known as atrial fibrillation, Canadian researchers report.

 Herceptin Best for Certain Breast Cancer Patients, Study Says

TUESDAY, Sept. 30, 2014 (HealthDay News) -- Herceptin is the best drug treatment for a type of breast cancer called HER2-positive and should remain the standard of care for that type of tumor, according to new findings from a long-term clinical trial.

 Health Highlights: Sept. 30, 2014

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

 Health Tip: Curbing Nighttime Nursing

(HealthDay News) -- Older babies may be able to sleep through the night, but may still wake up to nurse.

 Health Tip: Get Physical Activity

(HealthDay News) -- Hitting the gym or going for a run are great ways to exercise, but there are lots of other ways to burn calories.

Yesterday

 Antibiotic Use Before Age 2 Might Raise Obesity Risk, Study Says

MONDAY, Sept. 29, 2014 (HealthDay News) -- Children who are given broad-spectrum antibiotics before the age of 2 may face a slightly higher risk of becoming obese during childhood, new research suggests.

 Doctors' Group Issues Painkiller Guidelines

MONDAY, Sept. 29, 2014 (HealthDay News) -- The risks of powerful narcotic painkillers outweigh their benefits for treating chronic headaches, low back pain and fibromyalgia, a new statement from the American Academy of Neurology says.

 Too Many Heart Scans May Pose Radiation Risks, Cardiologists Say

MONDAY, Sept. 29, 2014 (HealthDay News) -- Doctors need to make sure patients understand the radiation-related risks of heart imaging tests before sending them for such procedures, a new American Heart Association scientific statement says.

 Medical Implant Devices Skate Through Review Process, Studies Claim

MONDAY, Sept. 29, 2014 (HealthDay News) -- Every day, people receive medical implants -- artificial valves, hip replacements, surgical mesh and the like -- that may not have been rigorously tested before or after their approval by the U.S. Food and Drug Administration, two new studies contend.

 Rat Study Suggests Light at Night Might Hamper Breast Cancer Therapy

MONDAY, Sept. 29, 2014 (HealthDay News) -- A study in rats hints that exposure to dim light at night may make human breast cancer tumors resistant to the chemotherapy drug doxorubicin.

 40 States, District of Columbia Reporting Respiratory Virus That Targets Kids

MONDAY, Sept. 29, 2014 (HealthDay News) -- Forty states and the District of Columbia now have a total of 277 confirmed cases of Enterovirus D68, the severe respiratory illness that typically targets children, U.S. health officials are reporting.

 Drug Gives Big Survival Boost Against Type of Advanced Breast Cancer

MONDAY, Sept. 29, 2014 (HealthDay News) -- Adding the drug Perjeta to a standard medication, Herceptin, may give women with a form of advanced breast cancer a significant boost in survival, a new study finds.

 Obese in Adolescence, Colon Cancer in Later Life?

MONDAY, Sept. 29, 2014 (HealthDay News) -- Obesity and inflammation in late adolescence are associated with increased risk for colon and rectal cancer in adulthood, a new study of Swedish males suggests.

 Emotional Life Lingers for Alzheimer's Patients, Even as Memory Fades

MONDAY, Sept. 29, 2014 (HealthDay News) -- For those visiting a person with advanced Alzheimer's, the moment can be bittersweet -- will the patient even remember or care that the loved one was there?

 American Doctor Exposed to Ebola Admitted to NIH Hospital

MONDAY, Sept. 29, 2014 (HealthDay News) -- Another American doctor exposed to the Ebola virus while working in West Africa was admitted Sunday to a hospital at the National Institutes of Health in suburban Washington, D.C.