| ELF | elective low forceps; extremely low frequency |
|---|---|
| Fc | centroid frequency; fraction/centrifuge; fragment, crystallizable [of immunoglobulin] |
| FCF | fetal cardiac frequency; fibroblast chemotactic factor |
| FDFQ | Food/Drink Frequency Questionnaire |
| FE | fatty ester; fecal emesis; fetal erythroblastosis; fetal erythrocyte; fluid extract; fluorescent ery... |