fFN (Fetal Fibronectin) Test

What a Positive Test Result Means

A positive test result means your body is leaking fetal fibronectin, a sign that your body may be getting ready to deliver.

There is an increased chance that your baby is going to arrive early — but not everyone with a positive test result delivers early. The test can be repeated as often as every two weeks to monitor your ongoing risk.

Developing a plan of action

Knowing this information will help you and your doctor prepare for a possible preterm birth, and take appropriate steps to help manage your pregnancy.

Depending on what week of pregnancy you are in, some recommendations your doctor may suggest include:

  • Limiting activities
  • Reducing stress
  • Bed rest
  • Finding and treating any undiagnosed infection(s)
  • Watching for cervical changes that would signal onset of labor
  • Consulting with a high-risk pregnancy specialist
  • Tocolytic drugs, which are used to alleviate preterm contractions
  • Corticosteroids, which may aid in your baby's lung development
  • Monitoring for other symptoms that may be indicative of preterm labor
  • Additional intervention if and when preterm labor begins

Making preparations

Knowing there is a risk of preterm delivery gives you the chance to make personal and practical preparations at home with your family:

  • Getting enough rest, as directed by your doctor.
  • Dismissing any feelings of guilt you may have about taking care of yourself. This isn't self-indulgence — it's doing the right thing for your baby!
  • Preparing your support system. Ask for help from your family and friends, and plan ahead for any support you might need to keep your household running and your other children cared for.
  • Being ready for delivery (packing a bag, planning transportation, etc.).
  • Making sure you have everything you'll need when you bring your baby home.


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