| AGC | Automatic gain control |
| BPP | Biophysical profile |
| dSP | The distance of two neighboring SPs |
| FBM | Fetal breathing movement |
| FHR | Fetal heart rate |
| IUGR | Intrauterine growth retardation |
| SIDS | Sudden infant death syndrome |
| SP | Starting point of FBM episode |
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