Editing Preterm birth (section)

===Fetal fibronectin===
[[Fetal fibronectin]] (fFN) has become an important biomarker—the presence of this glycoprotein in the cervical or vaginal secretions indicates that the border between the chorion and decidua has been disrupted. A positive test indicates an increased risk of preterm birth, and a negative test has a high predictive value.<ref name=Goldenberg2008/> It has been shown that only 1% of women in questionable cases of preterm labor delivered within the next week when the test was negative.<ref>
{{cite journal | vauthors = Lu GC, Goldenberg RL, Cliver SP, Kreaden US, Andrews WW | title = Vaginal fetal fibronectin levels and spontaneous preterm birth in symptomatic women | journal = Obstetrics and Gynecology | volume = 97 | issue = 2 | pages = 225–228 | date = February 2001 | pmid = 11165586 | doi = 10.1016/S0029-7844(00)01130-3 | s2cid = 34818112 }}</ref>