The fetal biophysical profile (BPP) is a noninvasive, ultrasound test for evaluating the fetus for signs of compromise. Ultrasound is used to assess four discrete biophysical parameters: fetal movement, fetal tone, fetal breathing, and amniotic fluid volume. The fetus has 30 minutes to perform these activities and points are assigned for each activity appreciated. The most points a fetus can get with ultrasound is 8. A score of 8 is reassuring. A score of 6 may require a second BPP within 12 to 24 hours. A score of 4 or less may mean you need additional tests or that your baby might need to be delivered. The biophysical profiles are short and simple to perform. Sometimes a non-stress test will be added for additional assessment.