Cervical funneling or intra‐amniotic debris and preterm birth in nulliparous women with midtrimester cervical length less than 30 mm
Saade G, Thom E, Grobman W, Iams J, Mercer B, Reddy U, Tita A, Rouse D, Sorokin Y, Wapner R, Leveno K, Blackwell S, Esplin M, Tolosa J, Thorp J, Caritis S, Vandorsten J, Network T. Cervical funneling or intra‐amniotic debris and preterm birth in nulliparous women with midtrimester cervical length less than 30 mm. Ultrasound In Obstetrics And Gynecology 2018, 52: 757-762. PMID: 29155504, PMCID: PMC5960623, DOI: 10.1002/uog.18960.Peer-Reviewed Original ResearchConceptsCervical funnelingMidtrimester cervical lengthCervical lengthPreterm birthWeeks' gestationNulliparous womenMedian cervical lengthSecondary cohort analysisNulliparous pregnant womenSecond trimester ultrasoundAsymptomatic nulliparous womenMultivariable adjustmentSingleton gestationsMulticenter trialMultivariable analysisTransvaginal ultrasoundSecond trimesterPregnant womenCohort analysisGestationWomenHigh rateWeeksUltrasoundLt