Practical guides to hormone testing
Hormone test reports can be confusing: unfamiliar units, ranges that differ between labs, and results that only make sense in context. These guides walk through the practical questions people ask most often, so you can read your report with more confidence and ask better questions at your appointment.
Browse guides
How to Read Your Hormone Lab Results
A plain-language guide to reading hormone lab results: analytes, units, reference ranges, H and L flags, and why out of range is not always abnormal.
How to Prepare for a Hormone Blood Test
A practical guide to preparing for a hormone blood test: timing, fasting, cycle timing, medications to mention, and why to follow clinician instructions.
Understanding Reference Ranges on Lab Tests
Learn what a lab reference range is, how labs derive them, why ranges differ between labs and assays, and how age and sex shape what counts as typical.
Understanding Hormone Test Units Explained
A practical guide to hormone test units — what ng/dL, pmol/L, mIU/L, and similar units mean, why labs differ, and why unit conversions need care.
What to Expect at a Blood Draw: A Guide
A calm, practical guide to what happens at a blood draw for hormone testing — before, during, and after the appointment, plus tips for a smoother experience.
At-Home Hormone Test Kits: What to Know
A balanced guide to at-home hormone test kits — how they work, their possible benefits and real limitations, and why clinician interpretation matters.
Hormones and Fertility: A Practical Guide
A plain-language guide to the hormones involved in fertility — how FSH, LH, estrogen, progesterone, and testosterone shape reproduction in women and men.
Hormones and Mental Health: A Guide
A plain-language guide to how thyroid, cortisol, and sex hormones relate to mood, energy, and mental wellbeing — and why the links are complex.
How Hormone Feedback Loops Work Explained
A plain-language guide to hormone feedback loops — how the brain, glands, and target organs regulate one another, and why this explains many test results.
Hormones and Exercise: A Guide
A plain-language guide to how exercise affects hormones like cortisol, testosterone, insulin, and growth hormone — and how this fits into hormone testing.
Hormones and Sleep: A Guide
A plain-language guide to how sleep shapes hormones like cortisol, melatonin, growth hormone, and others — and why sleep can affect hormone test results.
Hormones and Diet: What to Know
A plain-language guide to how diet interacts with hormones like insulin, thyroid hormone, and others — including why fasting can affect hormone test results.
Understanding Thyroid Test Results
A plain-language guide to common thyroid test results — TSH, free T4, and free T3 — and how to read them together rather than as single numbers.
When to See an Endocrinologist
A plain-language guide to what an endocrinologist does, when a referral might happen, and how to prepare for a visit about a hormone or gland concern.
Sources
- MedlinePlus (U.S. National Library of Medicine). How to Understand Your Lab Results. https://medlineplus.gov/lab-tests/how-to-understand-your-lab-results/
- MedlinePlus. How to Prepare for a Lab Test. https://medlineplus.gov/lab-tests/