Foetal Fibronectin
FFN
242.55
Vaginal Swab (Hologic specimen collection kit)
Consultant approval required.
Swabs are ordered by the ward. The laboratory does not hold any supplies.
Biochemistry
Mon - Sun, 24hrs
90 minutes
Cytyc TLilQ
Fetal Fibronectin (fFN) plays an important role as an adhesive component of the extracellular matrix at the choriodecidual interface and is present in physiologically found in cervicovaginal secretions up to 21 weeks of gestation. Testing fFN may be useful for some pregnant women with gestational age 22 weeks 0 days to 36 weeks 6 days, with symptoms of preterm labor, to help predict their risk of premature delivery.
Risk of delivery in symptomatic woman based on fFN level
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Delivery ≤ 7 days |
Delivery ≤ 14 days |
Delivery before 34 wks, 0 days |
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fFN level (ng/ml) |
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N (%) |
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|
< 10 |
170 (57%) |
1% |
1.80% |
1.50% |
|
10 to 49 |
62 (21%) |
0% |
1.60% |
8.20% |
|
50 - to 199 |
41 (14%) |
0% |
7.70% |
11.50% |
|
200 - 499 |
14 (5%) |
14% |
29% |
33% |
|
≥ 500 |
13 (4%) |
38% |
46% |
75% |
FFN
