| Rb | Imp rubber base impression |
|---|---|
| SBR | small bowel resection; spleen-to-body [weight] ratio; strict bed rest; styrene-butadiene rubber |
| ELF | elective low forceps; extremely low frequency |
| FACH | forceps to after-coming head |
| FD | familial dysautonomia; family doctor; fan douche; fatal dose; fetal danger; fibrin derivative; fibro... |