EVALUATION FOR PUTATIVE PRETERM RISK FACTORS 9 subjects in Validation Set 4 Subjects with CST4 samples 5 subjects with no CST4 samples Gardnerella Ureaplasma TRUE-· TRUE 10521 E 10530 10533 Two delivered preterm FALSE -A FALSE-◆ 10542 10542 Relative abundance Relative abundance (Log10-regularized) (Log10- regularizedEVALUATION FOR PUTATIVE PRETERM RISK FACTORS 14 Two delivered preterm