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  • Title: Ultrasonographic and Biochemical Markers of Preterm Labor.
    Author: Rizzo G, Capponi A, Angelini E, Romanini C.
    Journal: J Matern Fetal Investig; 1998 Dec; 8(4):150-155. PubMed ID: 9892747.
    Abstract:
    > At present preterm delivery is the leading cause of perinatal morbidity and mortality and its incidence is remained stable during the past 10 years. Conventional methods of identifying patients at risk of preterm delivery such as obstetrics history, demographic factors or evaluation of uterine contractions and cervix by digital examination show disappointintly low sensitivity and positive predictive value. In this review we describe new ultrasonographic and biochemical approaches that have been recently proposed to screen for preterm labor both in patients with intact and with premature rupture of the membranes. The ultrasonographic detection of a short uterine cervix and/or of a dilation of the internal os, expression of weakening of the lower uterine segment or cervical ripening, seems to efficiently predict patients at risk of preterm delivery. The efficiency of this marker may be improved by the association with the assay of fetal fibronectin or pro inflammatory cytokines (interleukin-6 and interleukin-8) in cervical secretions. Further by the concentrations of interleukin-6 and interleukin-8 in cervical secretions seems to be possible to predict among patients in preterm labor those secondary to subclinical endoamniotic infection or chorioamnionitis. The use of these new markers in the future may allow a better identification of patients at risk of preterm labor and a proper selection of the treatment (medical or surgical) required for such patients.
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