What Is Fetal Fibronectin (fFN)?

What it is

Fetal fibronectin in cervicovaginal secretion

Why it matters

Risk-stratifies preterm birth (high NPV).

Specimen

Cervicovaginal secretion

Interpretation

Negative = low preterm-birth risk

Limitations

Risk-stratification aid, not diagnostic

Related test: fFN Rapid Test — specimen: Vaginal secretion