Mancuso, Melissa S Cervical funneling: effect on gestational length and ultrasound-indicated cerclage in high-risk women. [electronic resource] - American journal of obstetrics and gynecology Sep 2010 - 259.e1-5 p. digital Publication Type: Journal Article; Multicenter Study; Randomized Controlled Trial; Research Support, N.I.H., Extramural ISSN: 1097-6868 Standard No.: 10.1016/j.ajog.2010.07.002 doi Subjects--Topical Terms: AdultAmnion--diagnostic imagingCerclage, CervicalCervical Length MeasurementCervix Uteri--diagnostic imagingFemaleGestational AgeHumansMultivariate AnalysisPregnancyPregnancy, High-RiskPremature Birth--epidemiology