Sim, Shirlene Factors associated with spontaneous preterm birth risk assessed by transvaginal ultrasound following cervical cerclage. [electronic resource] - The Australian & New Zealand journal of obstetrics & gynaecology Aug 2015 - 344-9 p. digital Publication Type: Evaluation Study; Journal Article ISSN: 1479-828X Standard No.: 10.1111/ajo.12361 doi Subjects--Topical Terms: AdultCerclage, CervicalCervical Length MeasurementElective Surgical ProceduresFemaleFollow-Up StudiesHumansPredictive Value of TestsPregnancyPremature Birth--diagnostic imagingRetrospective StudiesTreatment OutcomeUterine Cervical Incompetence--diagnostic imaging