Estradiol (E2) [Serum]

. The ideal timing for measuring estradiol can depend on the specific context and the purpose of the assessment:
# For pre-menopausal women: The best time to test is on day 2-4 (ideally day 3) of the cycle, which is when estradiol levels are relatively stable and low.
# For post-menopausal women: E2 can be tested at any time.
# For pregnant women: the timing of the test depends on the stage of pregnancy.
Note: Please consult your doctor regarding the timing and any specific instructions related to your health condition or treatment plan.
. If possible, stop using any medicines that influence Estradiol levels e.g., Steroid, ACTH, Gonadotropin, or Estrogen medications, for at least 48 hours before collection. Oral contraceptives and estrogen replacement therapy may influence Estradiol levels.
Note: Please consult your doctor on which medicine to stop and for how long.
. It is advisable to avoid strenuous physical activity before the test.

After 2 hours 50 minutes
After cutoff: 8:50 AM next day