| Abbreviations | Meaning |
 | RSA | Right Sacroanterior (fetal Position) |
| LST | Lateral Spinothalamic Tract; Lateral Spreading Tumor; Left Sacrotransverse [fetal Position]; Life-sustaining Treatment |
| LSA | Left Sacro-anterior [fetal Position]; Left Subclavian Artery; Leukocyte-specific Activity; Lichen Sclerosus Et Atrophicus; Lymphosarcoma |
| LSCA | Left Scapulo-anterior [fetal Position] |
| FE | Fetal Erythrocyte |
| PIFG | Poor Intrauterine Fetal Growth |
| FRH | Fetal Rhesus Monkey [kidney Cell] |
| MA | Mentum Anterior [fetal Position] |
| EF | Erythroblastosis Fetalis |
| RSL | Right Sacrolateral [fetal Position] |
| HFB | Human Fetal Brain |
| LSCP | Left Scapulo-posterior [fetal Position] |
| IFM | Internal Fetal Monitor; Isoleucine, Phenylalanine, And Methionine |
| LFD | Late Fetal Death |
| RSP | Right Sacroposterior [fetal Position] |
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