ACOG Practice Bulletin No. 31: Assessment of Risk Factors for Preterm BirthObstetrics & Gynecology: October 2001 - Volume 98 - Issue 4 - p 709–716 Articles This document has been withdrawn or is no longer available. Please contact the Resource Center at the American College of Obstetricians and Gynecologists (firstname.lastname@example.org; 202-863-2518) for further information. The current “Committee Opinion List of Titles” is available online at http://www.acog.org/goto/COListOfTitles The current “Practice Bulletin List of Titles” is available online at http://www.acog.org/goto/PBListOfTitles© 2001 by The American College of Obstetricians and Gynecologists. Published by Wolters Kluwer Health, Inc. All rights reserved.