Peer pressure is something that every child, especially teenagers, face, both directly from friends and peers, and also indirectly when they see other people doing something.

Many teens find themselves becoming parents much earlier than expected. There are both positive and negative aspects of having children at such a young age. Having a baby is a huge responsibility, and many teens find themselves unprepared to meet this type of life disruption and challenge.

It's upsetting to see your teen sad, especially when that sadness is the symptom of feeling disconnected, isolated and above all, lonely. Loneliness in teens can cause a bevy of problems -- in a 2003 article for Psychology Today, Hara Estroff Marano even links a lack of connection to high school dropouts.

For most teens, homework is part of high-school life, who spend an average of four hours each week doing homework -- on top of a 32 1/2-hour school week, according to researchers at the University of Michigan.

Teen girls don't always have regular periods, particularly when they first start menstruating. Over time, however, most girls experience regular periods that occur, on average, every 21 to 45 days.

Although adolescents need limits and guidelines to keep them in check during the teen years, some rules push the process over the top. As you contemplate your teenager’s curfew, learn the negative aspects of this teen rule to educate yourself thoroughly.

Sexual promiscuity among teenage girls can have many adverse consequences, including risks to their physical and emotional health, and unwanted pregnancies. Approximately 400,000 teenage girls gave birth during 2009, according to the Centers for Disease Control and Prevention (CDC).

Some days, it seems the only thing teenagers love more than their cell phones is staying in bed. But are they a "lazy, unaware and apathetic" Generation Z, as The Huffington Post put it in 2013? If it's tough getting your teen to take an interest in schoolwork, community life or the chores, take heart.

The bad boy persona is one that teen girls -- and women -- are presented with on TV, in movies and in books, according to Boston-based psychiatrist Susan Carey. These bad boys often are dangerous and inappropriate, but they turn out to be sweet guys by the end.

As girls progress into adolescence, they may seem to change, almost overnight, from innocent children who dress like what they are -- young girls. They begin choosing revealing and provocative clothing. They start to communicate almost constantly with boys in their classes.

Conformity describes shaping actions and beliefs to align with the opinions and behaviors of others. Tweens, typically students in middle school, feel pressure to conform during the middle-adolescent years.

Growth and development during the teenage years depends on a variety of factors, including adequate sleep and exercise, hormone levels, overall health and proper nutrition. Nutritional deficiencies can significantly stunt growth, resulting in short stature, delayed development and poor weight gain.