Biophysical Profile (BPP)
A biophysical profile (BPP) test measures the health of your baby (fetus) during pregnancy. A BPP test may include a nonstress test with electronic fetal heart monitoring and a fetal ultrasound. The BPP measures your baby's heart rate, muscle tone, movement, breathing, and the amount of amniotic fluid around your baby.
A BPP is commonly done in the last trimester of pregnancy. If there is a chance that your baby may have problems during your pregnancy (high-risk pregnancy), a BPP may be done by 32 to 34 weeks or earlier. Some women with high-risk pregnancies may have a BPP test every week or twice a week in the third trimester.
Why It Is Done
A biophysical profile (BPP) test is done to:
How To Prepare
You may need a full bladder for the test. If so, you will be asked to drink water or other liquids just before the test and to avoid urinating before or during the test. Usually women in the third trimester do not need to have a full bladder.
If you smoke, you will be asked to stop smoking for 2 hours before the external monitoring test because smoking decreases your baby's activity.
Talk to your doctor about any concerns you have regarding the need for the test, its risks, how it will be done, or what the results may mean. To help you understand the importance of this test, fill out the medical test information form(What is a PDF document?).
How It Is Done
Most often, a biophysical profile (BPP) is performed by your obstetrician. But it may be done by an ultrasound technologist or radiologist. A BPP can be done in your doctor's office, hospital, or clinic.
Some doctors may use a modified biophysical profile, which combines a nonstress test and measurements of the amniotic fluid (amniotic fluid index).
External fetal heart monitoring records your baby's heart rate while your baby is moving and not moving. It is usually done just before a fetal ultrasound.
External monitoring is done using two flat devices (sensors) held in place with elastic belts on your belly. One sensor uses reflected sound waves (ultrasound) to keep track of your baby's heart rate. The other sensor measures the duration of your contractions. The sensors are connected to a machine that records the information. Your baby's heartbeat may be heard as a beeping sound or printed out on a chart.
If your baby moves or you have a contraction, you may be asked to push a button on the machine. Your baby's heart rate is recorded and compared to the record of movement or your contractions. This test usually lasts about 30 minutes.
Often you do not need to remove your clothes for the ultrasound test; you can lift your shirt and push down the waistband of your skirt or pants. If you are wearing a dress, you will be given a cloth or paper covering to use during the test.
When the test is finished, the gel is cleaned off of your skin. You can urinate as soon as the test is done. Transabdominal ultrasound takes about 30 to 60 minutes.
Ultrasound technologists are trained to gather images of your fetus but can't tell you whether it looks normal or not. Your health professional will share this information with you after the ultrasound images have been reviewed by a radiologist or perinatologist.
How It Feels
Lying on your back (or side) during the test may be uncomfortable. During a fetal ultrasound, you may have a feeling of pressure in your bladder. The gel may feel cool when it is first applied to your stomach. You will feel a light pressure from the transducer as it passes over your abdomen.
There is very little chance of either the mother or the baby having a problem from a biophysical profile (BPP). But you may feel anxious if the ultrasound reveals a problem with your pregnancy or baby. A nonstress test may falsely show distress in a baby that is actually healthy.
A biophysical profile (BPP) test measures the health of your baby (fetus) during pregnancy. The results are scores on five measurements in a 30-minute observation period.
A score of 8 to 10 points means that your baby is healthy. A score of 6 to 8 points means that you may need to be retested in 12 to 24 hours. A score of 4 or less may mean the baby is having problems. Further testing will be recommended.
What Affects the Test
Reasons you may not be able to have the test or why the results may not be helpful include:
What To Think About
Other Places To Get Help
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