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Hormone testing guide — start here · 2026
This is the hub page for hormone testing at MedEx. Start with the symptom, not the panel — the biggest test list is almost never the right answer.
The right hormone panel in Bangkok depends on the question you are asking, not on how many markers it contains. Four things determine whether a result will be useful: choosing markers that match the symptom, drawing at the correct time of day, drawing on the correct cycle day where relevant, and having context markers on the same sample. This guide maps the common presentations — irregular cycles, low libido, fatigue, hair and skin changes, fertility planning and menopause symptoms — to the panel that actually answers them.
| Morning-only markers | Testosterone, cortisol, 17-hydroxyprogesterone |
|---|---|
| Cycle day 2–4 | FSH, LH, estradiol |
| Mid-luteal | Progesterone, 7 days before the expected next period |
| Any time | AMH, DHEA-S, TSH, free T4, prolactin, IGF-1, SHBG |
| Collection | At home in Bangkok or at 20+ MedEx sites nationwide; nurse-at-home draw available |
| Price | Listed on the MedEx lab test catalogue — same price nationwide |
| Irregular or absent periods | TSH, free T4, prolactin, total testosterone, SHBG, DHEA-S, LH, FSH, estradiol, pregnancy test. See the PCOS panel guide. |
|---|---|
| Low libido or erectile difficulty (men) | Morning total testosterone (twice), SHBG, albumin, LH, FSH, prolactin, TSH, HbA1c, lipids |
| Fatigue with no clear cause | Full blood count, ferritin, TSH, free T4, HbA1c, vitamin D, B12, liver and kidney function — before any hormone panel |
| Hirsutism, acne, hair thinning (women) | Total testosterone, SHBG, DHEA-S, 17-hydroxyprogesterone (early morning, follicular), LH, FSH, prolactin |
| Fertility planning | AMH any day; FSH, LH, estradiol day 2–4; progesterone mid-luteal; TSH, prolactin, ferritin, rubella IgG |
| Menopause symptoms over 45 | Usually a clinical diagnosis. Test TSH, ferritin and HbA1c to exclude mimics rather than FSH |
| Suspected cortisol excess or deficiency | 8–9am serum cortisol; late-night salivary cortisol or dexamethasone suppression for excess |
Testosterone and cortisol: 8–10am. Both peak in the early morning and fall sharply through the day. An afternoon draw produces a number that cannot be compared against the reference range printed beside it.
FSH, LH, estradiol: cycle day 2 to 4. Count the first day of full flow as day 1. Later draws cannot be compared against day-3 ranges.
Progesterone: seven days before the expected next period. Count backwards, not forwards — the luteal phase is the fixed part of the cycle.
17-hydroxyprogesterone: early morning, follicular phase. It has a marked diurnal rhythm and rises in the luteal phase.
AMH, DHEA-S, TSH, prolactin, SHBG, IGF-1: any time. Prolactin is best drawn without prior nipple stimulation, strenuous exercise or venepuncture stress, so a calm, seated draw is preferable.
Hormone results are frequently uninterpretable because the supporting values are missing. Four inexpensive additions prevent most of this:
All of these can run from a single draw. Build the combination through the MedEx lab test catalogue or the functional lab test service.
Tell us the symptom and we will build the panel around it.
Four-point salivary cortisol curves for fatigue. Not validated; adrenal fatigue is not a recognised diagnosis.
Fasting insulin and HOMA-IR for routine PCOS assessment. Explicitly not recommended by international guidance — poorly standardised and rarely change management.
Direct free testosterone immunoassays. Unreliable at the low end. Calculate from total testosterone, SHBG and albumin instead.
FSH to diagnose menopause over 45. Not required when symptoms and cycle change are typical.
Random growth hormone. Pulsatile and uninformative; IGF-1 is the appropriate screening marker.
Very large “complete hormone” bundles ordered without a question. They generate borderline results that create anxiety and follow-up tests without changing any decision.
Blood collection is available at home in Bangkok and at more than 20 MedEx sites nationwide, with the same price across locations and a nurse-at-home service where a clinician-assisted draw is preferred. Individual biomarkers can be searched in the lab directory, or bundled into a broader health checkup package.
Because timing decides so much, tell the booking team what you are testing for and, where relevant, your cycle day — they can schedule the draw to the right morning window. Results are reviewed with a MedEx doctor or, where a specialist opinion is needed, through teleconsultation.
For organisations arranging testing for staff, see corporate health checkups.
It depends entirely on the question. For men, a basic panel is morning total testosterone, SHBG, LH, FSH and prolactin. For women with cycle disturbance, it is TSH, free T4, prolactin, total testosterone, SHBG, DHEA-S, LH, FSH and estradiol with correct cycle timing.
Most hormones do not require fasting, but morning appointments are standard for testosterone and cortisol, and fasting lets you add glucose and lipids to the same sample.
Testosterone, cortisol and 17-hydroxyprogesterone all have a strong daily rhythm and should be drawn between 8am and 10am.
FSH, LH and estradiol are drawn on day 2 to 4. Progesterone is drawn seven days before the expected next period. AMH, DHEA-S, prolactin and thyroid tests can be drawn on any day.
Not usually. Large untargeted panels tend to produce borderline results that prompt anxiety and further testing without changing management. A panel matched to a specific question is more useful.
Yes. At-home collection is available in Bangkok and at MedEx sites nationwide, with the same price across locations. Mention your cycle day or preferred morning window when booking.
Not sure where to start? A short consultation saves a lot of unnecessary testing.
Medical disclaimer: This article is general health information and does not replace medical advice, diagnosis or treatment. Laboratory reference ranges differ between laboratories and results must be interpreted alongside your symptoms, medicines and medical history. Speak with a qualified clinician before starting, stopping or changing any treatment. Service details, inclusions and prices can change — confirm them with MedEx before booking.
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