The "Parents Speak Up" national campaign urges parents to talk to their children about sex, their values and how waiting can contribute to future success.

"During my time as a pediatrician and a public health official, I've learned that parents often need additional tools when dealing with tough issues facing their children," Dr. John Agwunobi, HHS assistant secretary for health, said in a statement. "There are few issues tougher or more important to discuss than sex."

The campaign was developed based on research that indicates youths look to their parents for guidance when it come to making decisions about sex.

When families encourage open communication, and teens live in an environment where values are clearly expressed, they are more likely to follow those values, according to Dan Schneider, HHS acting assistant secretary for children and families.

A 2005 Centers for Disease Control and Prevention survey found about one out of every three ninth-graders has had sexual intercourse at least once.