Biophysical Profile (BPP) Score Interpreter

A biophysical profile is a test used in the later part of pregnancy to check on a baby's wellbeing, usually when there's a reason to watch more closely — such as going past your due date, high blood pressure, diabetes, reduced movements, or a growth concern. It combines an ultrasound with a non-stress test (a tracing of the baby's heart rate) and looks at five things: fetal breathing movements, gross body movement, muscle tone, the amount of amniotic fluid, and the non-stress test result. A clinician performs and reads it in clinical context. Each of the five components scores either 2 or 0, and they add up to a total out of 10 — or out of 8 when the non-stress test isn't included.

Each of the five components gets 2 points if it's seen to a sufficient degree and 0 if it isn't — there's no in-between, so totals are even numbers. Out of 10 (or 8 when the NST is left out), a score of 8 to 10 is generally reassuring and points to fetal wellbeing over the next few days. A score of 6 is equivocal — borderline — and is commonly repeated, often within 24 hours, or followed by more testing. A score of 4 or lower is considered abnormal and prompts prompt further evaluation and, depending on how far along you are, a conversation about whether to deliver. These bands are standard, but your provider reads them alongside your gestational age and your whole clinical picture.

Amniotic fluid carries extra weight in a BPP. The other four components reflect how the baby is doing right now, but the amount of fluid reflects conditions over a longer stretch of time — a low reading (called oligohydramnios) can be an early sign that the placenta isn't supporting the baby as well. Because of that, a low fluid reading is clinically important on its own: providers often pursue further evaluation or closer monitoring, and may discuss delivery, even when the other components look fine and the total is 8. In other words, an 8 out of 10 where the two missing points are the fluid is not read the same way as an 8 where the fluid is normal.

The non-stress test is one of the five components, but it isn't always done as part of the ultrasound assessment. When it's left out, the BPP is scored on the four ultrasound components alone, for a maximum of 8 (a form of what's sometimes called the ultrasound-only profile). This is distinct from the modified BPP, which is a different two-part test (a non-stress test plus an amniotic-fluid check) that keeps the NST. The interpretation shifts to the smaller scale: 8 out of 8 is reassuring, 6 is equivocal, and 4 or lower is abnormal. This tool lets you mark the non-stress test as 'not performed,' and it then scores your result out of 8 and reads it on that scale.

No. A BPP requires an ultrasound and, usually, a monitored non-stress test, both performed and interpreted by trained staff — you can't measure breathing movements, tone, fluid pockets, or a heart-rate tracing yourself. This tool is meant to help you understand a score your care team has already given you: you enter what they observed for each component and it adds up the total and explains what that total generally means. If you want to keep an eye on things between visits, counting the baby's movements is the at-home step providers recommend — see the kick counter.

Yes. This tool runs entirely in your browser. The components you select are added up on your own device and are never sent to a server, saved, or shared — close the tab and they're gone. It's general educational information based on the published biophysical profile scoring; it isn't medical advice, a diagnosis, or a decision about whether or when to deliver. The test and every decision that follows belong with the clinician who performed and read it.