What day of the menstrual cycle should one take a 24 hour urine cortisol test?

Testing. Urine cortisol us affected by stress and while your cycle can be stressful the day does not matter. If you are looking at your hormones and testing only one day in the month - then the best day would be day 21.

Related Questions

I'm on medications like diane 35, finasteride and aldactone (spironolactone). I have to take a 24 hour urine cortisol test. Will my medications affect the test result?

Cortisol test. It would be best to have the 24 hour urine without the drugs for one day but before you do that you must check with your doctor. It is not very likely that the meds will interfere with the lab but why take the chance before discussing with your doctor. Read more...