| TONE | tilted optimized nonsaturating excitation |
|---|
| FHD | Fetal Heart Tone |
|---|---|
| FHT | Fetal Heart Tone(s) |
| FHT | fast Hartley transform; fetal heart; fetal heart tone |
| MTDT | modified tone decay test |
| NTD | neural tube defect; nitroblue tetrazolium dye; noise tone difference; 5'-nucleotidase |