| LOP | leave on pass; left occipitoposterior [fetal position] |
|---|---|
| ODP | offspring of diabetic parents; right occipitoposterior [fetal position] [Lat. occipito-dextra poster... |
| OLP | left occipitoposterior [fetal position] [Lat. occipito-laeva posterior] |
| POP | diphosphate group; pain on palpation; paroxypropione; persistent occipitoposterior [fetal position];... |
| ROP | removal of pins or plates; removal of plaster [of Paris]; retinopathy of prematurity; right occipito... |