RT Journal Article SR Electronic T1 Cervical Prolapse During Pregnancy JF The Journal of the American Board of Family Practice JO J Am Board Fam Med FD American Board of Family Medicine SP 216 OP 218 DO 10.3122/15572625-13-3-216 VO 13 IS 3 A1 Devin Sawyer A1 Keith Frey YR 2000 UL http://www.jabfm.org/content/13/3/216.abstract AB