Yes, abstinence is the best policy!
Since there was not room in the CPHS Wolfpack for the references accompanying Dr. Sneeringer's letter, they are provided here.
Here is Drew Ober's original editorial.
Study links depression, suicide rates to teen sex
Effectiveness of Abstinence Education
Adolescents Who Take Virginity Pledges Have Lower Rates of Out-of-Wedlock Births
Absent Fathers Faulted
Father's Absence Increases Daughter's Risk of Teen Pregnancy