Fetal fibronectin test is used to assess risk of preterm labor. A positive result after 20 weeks indicates what?

• A. Increased risk of preterm labor
• B. Decreased risk
• C. Increased fetal lung maturity
• D. Placental insufficiency

Answer: (A)

Fetal fibronectin testing helps identify imminent risk of preterm labor. When this protein is detected in cervicovaginal secretions after about 20 weeks, it signals disruption of the fetal membranes and an increased likelihood that labor or birth will occur within a short window (often days to a couple of weeks). Therefore, a positive result indicates an increased risk of preterm labor, guiding decisions about close monitoring and possible interventions such as corticosteroids for fetal lung maturity and tocolysis if warranted. It does not indicate decreased risk, increased fetal lung maturity, or placental insufficiency.