Make your draw count
Wherever your panel falls in the window, a few habits make the result far easier to interpret against a model like this one.
- 1Draw before injectingOn an injection day, blood first preserves the trough read — the cleanest comparison between panels.
- 2Ask for sensitive LC-MS/MSEspecially for estradiol while a 19-nor is on board, because immunoassay cross-reactivity can inflate E2.
- 3Add cystatin C if kidney function mattersIt gives a cleaner kidney read than creatinine when muscle mass is changing.
- 4Bring home BP and resting-HR readingsRepeated seated readings beat a single anxious in-office number.