| FADS | fetal akinesia deformation sequence |
|---|---|
| FAV | facio-auriculovertebral [sequence]; feline ataxia virus; floppy aortic valve; fowl adenovirus |
| FRHS | fast-repeating high sequence |
| FRV | full-length retroviral [sequence]; functional residual volume |
| IGS | image-guided surgery; inappropriate gonadotropin secretion; internal guide sequence |