When to draw estradiol, why the day of the cycle changes everything, what it adds in menopause assessment and how it is used in men.
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How luteinising hormone is used to time ovulation, what the LH to FSH ratio means in PCOS, and how blood LH differs from urine ovulation kits.
When to draw FSH in the menstrual cycle, what it shows in menopause assessment and male infertility, and why it must be read with estradiol and LH.
When a DHEA-sulphate test is genuinely useful, what a high or low result suggests, and why it belongs in a panel rather than on its own.
What sex hormone binding globulin does, what raises and lowers it, and why testing SHBG alongside testosterone or estradiol prevents misdiagnosis.
Why calculated free testosterone usually beats a direct free testosterone assay, which inputs you need, and how to order the right combination in Bangkok.
Total versus free testosterone, why the 8-10am draw matters, what to test alongside it and how MedEx testosterone testing works in Bangkok and nationwide.
What an AMH test measures, when in your cycle to take it, how MedEx collection works in Bangkok and how to read an ovarian reserve result without over-interpreting it.
How the day-21 progesterone confirms ovulation, how to time it when cycles are irregular, and what a low result does and does not mean.
The full PCOS laboratory workup, how the 2023 international criteria work, which conditions must be excluded and the metabolic tests that matter most.