“…Among these, IL-6 demonstrates the greatest predictive value, since in asymptomatic women at 22-25 weeks its concentration in cervical fluid is significantly in case of subsequent PTD and in symptomatic women, affected by threatened PTD, it demonstrates ability to predict delivery within 2 and 7 days with a sensitivity and specificity of 60 and 77%, respectively, for predicting delivery within 2 days, and 62 and 80%, respectively, for predicting delivery within 7 days [106]. Furthermore, also in amniotic fluid, its concentration in asymptomatic women undergoing mid-trimester amniocentesis is higher in women with subsequent spontaneous PTD within 32 weeks of gestation, than those who delivered at term, showing an association of IL-6 levels in amniotic fluid and early PTD [107].…”