With fetal fibronectin (fFN) testing, a cervical or vaginal fluid sample is collected and analyzed for fFN, a glycoprotein found at the boundary between the amniotic sac and the lining of the uterus. The test is performed if a woman is 26 to 34 weeks pregnant and having symptoms of premature labor. High levels indicate an increased risk of preterm delivery. Measures can then be taken to delay birth and to help better prepare the fetus for birth. This is because pre-term babies can have potentially serious health complications.

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Tests: fFN