How you prepareBy Mayo Clinic staff
You don't need to do anything special to prepare for the fetal fibronectin test.
To avoid a false-positive result, the test will be done before any pelvic exam or vaginal ultrasound. It's also best to avoid having sex for 24 hours before the test.
Vaginal bleeding can affect the test results. If you experience vaginal bleeding, the fetal fibronectin test will likely be postponed.
If the amniotic sac ruptures — your water breaks — the test will be canceled. The amniotic sac is a fluid-filled membrane that cushions your baby in the uterus. If the sac is no longer intact, labor and delivery are inevitable — even if your baby isn't full term.
- Lockwood CJ. Fetal fibronectin for prediction of preterm labor and delivery. http://www.uptodate.com/home. Accessed Jan. 31, 2013.
- Lockwood CJ. Overview of preterm labor and birth. http://www.uptodate.com/index. Accessed Jan. 31, 2013.
- Frequently asked questions. Pregnancy FAQ173. Early preterm birth. American College of Obstetricians and Gynecologists. http://www.acog.org/~/media/For%20Patients/faq173.pdf?dmc=1&ts=20130215T1057545204. Accessed Feb. 15, 2013.
- Frequently asked questions. Pregnancy FAQ087. Preterm labor. American College of Obstetricians and Gynecologists. http://www.acog.org/~/media/For%20Patients/faq087.pdf?dmc=1&ts=20130131T1258459154. Accessed Jan. 31, 2013.
- Sanchez-Ramos L, et al. Fetal fibronectin as a short-term predictor of preterm birth in symptomatic patients: A meta-analysis. Obstetrics and Gynecology. 2009;114:631.
- DeFranco EA, et al. Improving the screening accuracy for preterm labor: Is the combination of fetal fibronectin and cervical length in symptomatic patients a useful predictor of preterm birth? American Journal of Obstetrics and Gynecology. In press. Accessed Feb. 15, 2013.
- Berghella V. Transvaginal ultrasound assessment of the cervix and prediction of spontaneous preterm birth. http://www.uptodate.com/home. Accessed Feb. 15, 2013.
- Healthy pregnancy: Staying healthy and safe. The National Women's Health Information Center. http://www.womenshealth.gov/pregnancy/you-are-pregnant/staying-healthy-safe.cfm. Accessed Feb. 15, 2013.
- American College of Obstetricians and Gynecologists. Your Pregnancy and Childbirth Month to Month. 5th ed. Washington, D.C.: American College of Obstetricians and Gynecologists; 2010:363.
- Harms RW (expert opinion). Mayo Clinic, Rochester, Minn. Feb. 15, 2013.