Today, even one missed period could have serious implications for a young person's life. But how late is late, and when is pain or a heavy period a medical concern? Many preteens don't know.
High school athletes who tended to focus on one sport were 50 percent more likely to get hurt than those who hadn't specialized. Injuries included ankle sprains, knee tendonitis, and stress fractures.
From birth through age 30 or so, our ability to recognize faces keeps improving, research shows. At first, kids discern adult faces better than other kids' mugs. Not so after adolescence.
Brands increasingly see tweens as a distinct consumer group. From menstruation products to underwear, advertisers are targeting young girls in an informal tone to gain loyal customers earlier on.