Chicago: Early adolescent girls lose friends for having sex and gain friends for ‘making out’, while their male peers lose friends for ‘making out’ and gain friends for having sex, finds a new study that will be presented at the 110th Annual Meeting of the American Sociological Association.

Washington: Abusive and controlling men are more likely to put their female partners at sexual risk, and the level of that risk escalates along with the abusive behavior, a UW study found.

Ann Arbor: With more kids online and using cell phones at increasingly younger ages, two issues have quickly climbed higher on the public’s list of major health concerns for children across the US: sexting and Internet safety.

Birmingham: A drive to find out why the United States has the highest rates of treatable sexually transmitted diseases in the developed world has been the career focus of one University of Alabama at Birmingham infectious disease expert.

Washington: Having friends who suffer from depression doesn’t affect the mental health of others, according to research led by the University of Warwick.

Washington: Violent video game play is linked to increased aggression in players but insufficient evidence exists about whether the link extends to criminal violence or delinquency, according to a new American Psychological Association task force report.