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During pregnancy, a uterine infection causes inflammation, which can trigger preterm labor. This inflammation can also stimulate the amnion cells to produce fetal fibronectin, a protein.
Fetal fibronectin testing is sometimes done when preterm labor symptoms are present. When the fetal fibronectin test is negative, it is unlikely that you are having preterm labor. But even if the test is positive, it does not mean for sure that you are having preterm labor.
For fetal fibronectin testing, a sample of fluid is collected from the vagina or the opening to the uterus (cervix). First, a speculum is used to spread the walls of the vagina to view the cervix. Next, a sterile swab is used to absorb fluid from the cervix or vagina. The speculum is removed and the swab is sent to the laboratory for testing.
A negative test result is quite accurate and shows that labor has not started. A positive test result may show that labor has started, but false-positive results are common. False-positive results can occur if a woman has recently had:
The fetal fibronectin test is:
ByHealthwise StaffPrimary Medical ReviewerSarah A. Marshall, MD - Family MedicineAdam Husney, MD - Family MedicineKathleen Romito, MD - Family MedicineSpecialist Medical ReviewerKirtly Jones, MD - Obstetrics and Gynecology, Reproductive Endocrinology
Current as ofNovember 21, 2017
Current as of:
November 21, 2017
Sarah A. Marshall, MD - Family Medicine
& Adam Husney, MD - Family Medicine & Kathleen Romito, MD - Family Medicine & Kirtly Jones, MD - Obstetrics and Gynecology, Reproductive Endocrinology
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