Timing is everything
for their everything


Rapid fFN® testing can help rule out imminent preterm birth and deliver peace of mind.


Be Confident in Your Care Decisions


Fetal fibronectin (fFN) testing can help reduce unnecessary admissions and interventions, such as steroids. Studies over the last two decades have shown that implementing a standard preterm labor protocol that includes fFN testing may help improve outcomes and optimize resources.1, 2

fFN customer testimonials

fFN testing fundamentals

fFN ≠ ROM testing.
Different tests. Different purposes.

Collecting an fFN specimen

Creating a PTL protocol to improve outcomes

Free educational resources & materials

Start with the test that has very high negative predictive value to rule out preterm birth


Determining which patients are in true preterm labor is a challenge.
fFN testing can help rule out ~80% of cases in question.3

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Multiple studies have shown that clinical assessment and cervical length may not be sufficient to rule out imminent preterm birth in patients. Adding fFN testing to clinical assessment and cervical length can improve preterm birth prediction by as much as 50%.4


Intervene when it’s needed—
Ensure peace of mind when it’s not


Fetal fibronectin (fFN) acts as an adhesive glycoprotein at the maternal-fetal interface3 and is usually not detectable in vaginal secretions between 16-35 weeks.5 Its premature presence in vaginal secretions is a biochemical indicator of preterm birth risk. fFN is the single common biochemical marker for all four mechanisms of preterm birth: activation of the maternal/fetal hypothalamic-pituitary-adrenal (HPA) axis, inflammation, decidual hemorrhage and pathological uterine distention.6

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When fFN is detectable in the vagina during weeks 22 to 35 of gestation, the Rapid fFN test returns a positive result. This indicates some type of disruption, and that the patient may be at risk of preterm delivery.3

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When fFN is not detectable in vaginal secretions, the Rapid fFN test returns a negative result. This indicates that the patient will have a less than 1% chance of delivering in the next two weeks.3


Intervene when it’s needed—
Ensure peace of mind when it’s not


Fetal fibronectin (fFN) acts as an adhesive glycoprotein at the maternal-fetal interface3 and is usually not detectable in vaginal secretions between 16-35 weeks.5 Its premature presence in vaginal secretions is a biochemical indicator of preterm birth risk. fFN is the single common biochemical marker for all four mechanisms of preterm birth: activation of the maternal/fetal hypothalamic-pituitary-adrenal (HPA) axis, inflammation, decidual hemorrhage and pathological uterine distention.6

Positive Test Icon

When fFN is detectable in the vagina during weeks 22 to 35 of gestation, the Rapid fFN test returns a positive result. This indicates some type of disruption, and that the patient may be at risk of preterm delivery.3

Negative Test Icon

When fFN is not detectable in vaginal secretions, the Rapid fFN test returns a negative result. This indicates that the patient will have a less than 1% chance of delivering in the next two weeks.3


Assess preterm birth risk with the Rapid fFN test


Contact us for more information about Rapid fFN®.


Assess preterm birth risk with the Rapid fFN test


Contact us for more information about Rapid fFN® test.