LatticeMLS
Menu

Module CC-08 · Version 1.0

Estradiol and the Hypothalamic-Pituitary-Gonadal Axis

Interpret a serum estradiol result against the hypothalamic-pituitary-gonadal (HPG) feedback loop, cycle phase, life stage, sex, and medication context, and recognize where immunoassay measurement runs out of low-end reliability.

Your next section

Start section 1

Read without an account. Sign in to save.

Who this module is for

Clinical laboratory scientists and trainees who release or explain estradiol results for reproductive, gender-affirming therapy, and oncology monitoring contexts.

Learning objectives

  • Relate estradiol, FSH, and LH through feedback logic
  • Explain cycle, age, pregnancy, sex, and exogenous-hormone effects on reference interpretation
  • Recognize low-concentration analytical limitations, cross-reactivity, and when a more specific method may be needed

How completion works

Mark every required section done and answer every knowledge check in those sections correctly. The final save completes the module automatically.

Sources

13 sources

  1. 1. Rosner W, Hankinson SE, Sluss PM, Vesper HW, Wierman ME. Challenges to the Measurement of Estradiol: An Endocrine Society Position Statement. J Clin Endocrinol Metab. 2013;98(4):1376-1387.

    Source note · professional society guidance

  2. 2. Hembree WC, et al. Endocrine Treatment of Gender-Dysphoric/Gender-Incongruent Persons: An Endocrine Society Clinical Practice Guideline. J Clin Endocrinol Metab. 2017;102(11):3869-3903.

    Source note · professional society guidance

  3. 3. 42 CFR 493.1253, Standard: Establishment and verification of performance specifications, Subpart K, CLIA, summarized via CMS CLIA guidance.

    Source note · federal regulation

  4. 4. College of American Pathologists. All Common Checklist, COM.40605 Reference Intervals (Phase II). CAP Accreditation Program, 12.09.2025 edition.

    Source note · accreditation standard

  5. 5. College of American Pathologists. All Common Checklist, COM.40300 Verification of Test Performance Specifications - FDA-cleared/approved (Phase II). CAP Accreditation Program, 12.09.2025 edition.

    Source note · accreditation standard

  6. 6. Roche Diagnostics. Elecsys Estradiol III method sheet, v10.0, September 2023.

    Source note · manufacturer labeling

  7. 7. ARUP Laboratories. Estradiol (Adult Premenopausal Females or Individuals on Estrogen Hormone Therapy), test 0070045, and Estradiol (Adult Males, Children, Postmenopausal Females...), test 0093247.

    Source note · laboratory reference

  8. 8. Mayo Clinic Laboratories. Estradiol, Serum (EEST, LC-MS/MS) and Estradiol, Rapid, Immunoassay, Serum (ESTS) test catalog entries.

    Source note · laboratory reference

  9. 9. StatPearls/NCBI Bookshelf. Physiology, Menstrual Cycle. NBK500020.

    Source note · peer-reviewed literature

  10. 10. Holland-Frei Cancer Medicine/NCBI Bookshelf. The Hypothalamic-Pituitary-Gonadal Axis. NBK13386.

    Source note · peer-reviewed literature

  11. 11. Endotext/NCBI Bookshelf. Endocrinology of the Testis and Spermatogenesis. NBK279031.

    Source note · peer-reviewed literature

  12. 12. Endotext/NCBI Bookshelf. Physiology of GnRH and Gonadotrophin Secretion. NBK279070.

    Source note · peer-reviewed literature

  13. 13. Sodergard R, Backstrom T, Shanbhag V, Carstensen H. Calculation of free and bound fractions of testosterone and estradiol-17beta to human plasma proteins at body temperature. J Steroid Biochem. 1982;16(6):801-810.

    Source note · peer-reviewed literature