Young children with attention-deficit hyperactivity disorder (ADHD) are roughly four times more likely than their peers to become depressed or attempt suicide in later childhood, a new study suggests.

Researchers followed 125 children with ADHD for up to 14 years beginning at ages 4 to 6, and compared them with a similar group of children without ADHD. Thirty-nine percent of the children with ADHD were also found to have depression during the study period, versus 8 percent in the control group.The risk for depression increased if the child demonstrated symptoms and behaviors that are distinct from -- but often occur alongside -- ADHD, such as anxiety, defiance, hostility, bullying, and fighting. The risk for depression was also more pronounced if the child's mother had a history of depression. [Read the full article]

(CNN) -- In one of the largest studies on sexual behavior in America, Indiana University investigators have found that more teens than adults use condoms -- and that sexual activity in the U.S. involves much more than the missionary position.The findings appear in a special edition of The Journal of Sexual Medicine in the form of nine distinct studies. All were funded by Church and Dwight, the company that makes Trojan condoms. Researchers collected information online from 5,865 people ranging in age from 14 to 94.The study authors asked men and women about 41 combinations of sexual acts, as well as whether they used condoms. Church and Dwight approved the information before its release.Knowledge Networks, a polling firm, conducted the study. Researchers chose a nationally representative sample of adolescents and adults from across the U.S. by mail. Once selected, people were interviewed online from March to May of 2009. [Read the full article]

"Bob Edwards certainly made a major impact on what we do we do every day, and the four million babies born as a result," said Dr. James Goldfarb, president of the Society for Assisted Reproductive Technology and director of infertility services at the Cleveland Clinic Health Systems.In vitro fertilization technology has evolved since the first successful birth in 1978, Goldfarb said, but he uses another word to describe the work of Edwards and his partner, Dr. Patrick Steptoe, who died in 1988: Revolution.Today, about 1 percent of infants born in the United States are conceived through assisted reproductive technologies, and 99 percent of those use in vitro fertilization, the U.S. Department of Health and Human Services reported in 2009. It's a medical procedure the public knows, doctors said, and infertile couples expect for it to be on the list of treatments. [Read the full article]