title: Interleukin-1 receptor antagonist in human cervicovaginal fluid in term pregnancy and labor.
abstract: OBJECTIVE
  The objective of the study was to investigate temporal changes in interleukin-1 receptor antagonist (IL-1ra) in human cervicovaginal fluid (CVF) in term pregnancy and labor.
  
  
  METHODS
  CVF was collected weekly from 155 multiparous women from 36 weeks' gestation until labor. High vaginal swabs were collected for microbiology assessment.
  
  
  RESULTS
  IL-1ra was decreased in spontaneous term labor, compared with 15-21 and 22-28 days from labor, and was significantly lower at 0-7 days, compared with 15-21 days before labor (P < .05, 2-way ANOVA). After subdividing the women, IL-1ra concentrations were 6-fold lower in women who had prelabor rupture of membranes at term than women who had spontaneous labor with intact membranes at 8-14 and 15-21 days before labor (P < .05, Student t test). IL-1ra concentrations were not affected by the microbial status of the vagina.
  
  
  CONCLUSIONS
  The changes in IL-1ra concentrations observed in the CVF may be linked to the remodeling of fetal membranes leading to rupture.
authors.affiliation: Department of Obstetrics and Gynaecology, University of Melbourne, Parkville, VIC, Australia.
authors.forename: Yujing J
authors.initials: YJ
authors.lastname: Heng
authors.forename: Megan K W
authors.initials: MK
authors.lastname: Di Quinzio
authors.forename: Michael
authors.initials: M
authors.lastname: Permezel
authors.forename: Gregory E
authors.initials: GE
authors.lastname: Rice
authors.forename: Harry M
authors.initials: HM
authors.lastname: Georgiou
mesh_terms: D000328:Adult; D000704:Analysis of Variance; D015415:Biomarkers / Q000032:analysis; D001826:Body Fluids / Q000737:chemistry*; D002585:Cesarean Section / Q000706:statistics & numerical data; D015331:Cohort Studies; D036861:Delivery, Obstetric / Q000379:methods*; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D005322:Premature Rupture of Fetal Membranes / Q000175:diagnosis*; D005865:Gestational Age; D006801:Humans; D053590:Interleukin 1 Receptor Antagonist Protein / Q000032:analysis*; D007751:Labor, Induced / Q000706:statistics & numerical data; D008423:Maternal Age; D010298:Parity; D011237:Predictive Value of Tests; D011247:Pregnancy; D011256:Pregnancy Outcome; D011336:Probability; D012680:Sensitivity and Specificity; D047929:Term Birth; D014626:Vaginal Smears
chemical_list: D015415:Biomarkers; D053590:Interleukin 1 Receptor Antagonist Protein