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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 someone has symptoms of preterm labor. If the test is negative, you probably aren't having preterm labor. But even if the test is positive, it doesn't mean for sure that you're having preterm labor.
For this test, 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. Then the swab is sent to the lab for testing.
A negative test result is quite accurate. It shows that labor hasn't started. A positive test result may show that labor has started. But false-positive results are common. They can occur if a woman has recently had:
The fetal fibronectin test is:
Current as of:
October 8, 2020
Author: Healthwise StaffMedical Review: Sarah Marshall MD - Family MedicineAdam Husney MD - Family MedicineKathleen Romito MD - Family MedicineKirtly Jones MD - Obstetrics and Gynecology
Current as of: October 8, 2020
Sarah Marshall MD - Family Medicine & Adam Husney MD - Family Medicine & Kathleen Romito MD - Family Medicine & Kirtly Jones MD - Obstetrics and Gynecology
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