RT Book, Section A1 Hwang, Loris Y. A1 Moscicki, Anna-Barbara A1 Shafer, Mary-Ann A2 Rudolph, Colin D. A2 Rudolph, Abraham M. A2 Lister, George E. A2 First, Lewis R. A2 Gershon, Anne A. SR Print(0) ID 7022508 T1 Chapter 233. Sexually Transmitted Infections T2 Rudolph's Pediatrics, 22e YR 2011 FD 2011 PB The McGraw-Hill Companies PP New York, NY SN 978-0-07-149723-7 LK accesspediatrics.mhmedical.com/content.aspx?aid=7022508 RD 2024/04/24 AB Currently, substantial numbers of adolescents engage in sexual intercourse: 34% have experienced their sexual debut by ninth grade and 63% by 12th grade.1 Although these rates have slowly decreased from 15 years ago the adolescent age group continues to be at the highest risk for STIs.