Contraction Stress Test
What Affects the Test
Reasons you may not be able to
have the test or why the results may not be helpful include:
- Past pregnancy problems, such as a
cesarean section with a midline (vertical) incision,
placenta previa, or
placenta abruptio. The test also is not recommended if
you are pregnant with more than one baby, are likely to have premature
rupture of the
membranes (PROM), have an
incompetent cervix, or have been given magnesium
sulfate during your pregnancy.
- A uterine surgery in the past. Strong
contractions may cause the uterus to rupture.
- If you smoke or use
- Movements of your baby during the test. It may be hard for
the sensors to record your baby's heart rate or contractions.
Being very overweight.
- Having a full bladder.
What To Think About
- A contraction stress test may show
decelerations when your baby is not actually having problems. This is called a
- Some doctors use
oxytocin instead of nipple stimulation because nipple stimulation can cause
long, uncontrolled contractions.
Other Works Consulted
Fischbach FT, Dunning MB III, eds. (2004).
Manual of Laboratory and Diagnostic Tests, 7th ed.
Philadelphia: Lippincott Williams and Wilkins.
Handbook of Diagnostic Tests
(2003). 3rd ed. Philadelphia: Lippincott Williams and Wilkins.
Pagana KD, Pagana TJ (2010). Mosby’s Manual of Diagnostic and Laboratory Tests, 4th ed. St. Louis: Mosby.
Primary Medical Reviewer
||Kathleen Romito, MD - Family Medicine
Specialist Medical Reviewer
||Liisa Honey, MD, FRCSC - Obstetrics and Gynecology
||December 9, 2010
WebMD Medical Reference from Healthwise
December 09, 2010
This information is not intended to replace the advice of a doctor.
Healthwise disclaims any liability for the decisions you make based on this
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