A negative result means that fetal fibronectin isn't present in your cervical fluid. If you're having contractions, you might be given drugs to temporarily stop them. Or, you might be given medications to decrease the risk of neurological complications, such as cerebral palsy, in your infant. Your health care provider might take steps to prepare for a potentially early birth, such as giving you steroids to speed your baby's lung maturity. If you have a positive result between weeks 22 and 34, you're at increased risk of premature birth within seven days. A positive result means that fetal fibronectin is present in your cervical secretions. Results of the fetal fibronectin test are either positive or negative: The device uses sound waves to digitally create images on a monitor. During the ultrasound, you'll lie on your back and your health care provider or technician will place a slender, wandlike device in your vagina. In some cases, a transvaginal ultrasound is done after the sample is taken to measure the length of your cervix. The sample will be sent to a lab for analysis. Your health care provider will place a speculum in your vagina and use a cotton swab to gently swipe secretions near your cervix. What you can expect During the procedureĭuring the fetal fibronectin test, you'll lie on your back on an exam table. If you experience vaginal bleeding or have had sex within the last 24 hours, the test probably won't be done.Īlso, avoid using douches or lubricants or placing medications in your vagina shortly before the test. Intercourse and vaginal bleeding can affect the test results, too. These tests can cause a release of fetal fibronectin and lead to a false-positive result. To avoid a false-positive result, the test will be done before any pelvic exam or transvaginal ultrasound. However, false-positive results can occur. The fetal fibronectin test is a simple procedure. Request an Appointment at Mayo Clinic Risks