Anti-Müllerian Hormone (AMH)
pmol/L
Hormones
A hormone produced by developing ovarian follicles.
Why it matters
The best available measure of ovarian reserve, used in fertility planning.
Thyroid Stimulating Hormone (TSH)
mIU/L
Thyroid
The pituitary's signal telling your thyroid how much hormone to produce.
Why it matters
The most sensitive early marker of thyroid trouble. TSH shifts before T4 and T3 do, and before most people notice symptoms.
Free T3
pmol/L
Thyroid
The active thyroid hormone your cells actually use to set metabolic rate.
Why it matters
Explains why some people feel hypothyroid despite normal TSH — conversion from T4 to T3 can be impaired.
Free T4
pmol/L
Thyroid
The unbound, available form of thyroxine — your thyroid's main circulating hormone.
Why it matters
Read with TSH, it separates a thyroid that is failing from a pituitary signalling problem.
Oestradiol (Estrogen)
pmol/L
Hormones
The main form of oestrogen, central to the menstrual cycle and bone health.
Why it matters
Interpreted against cycle timing in women; in men, raised levels can cause their own symptoms.
Follicle Stimulating Hormone (FSH)
IU/L
Hormones
The pituitary hormone that drives egg and sperm production.
Why it matters
A key marker of ovarian reserve and the transition into menopause.
Luteinizing Hormone (LH)
IU/L
Hormones
The pituitary hormone that triggers ovulation and testosterone production.
Why it matters
Its ratio to FSH is a central clue in diagnosing PCOS.
Progesterone
nmol/L
Hormones
The hormone that dominates the second half of the menstrual cycle.
Why it matters
Confirms whether ovulation occurred, which matters for fertility and cycle problems.
Prolactin
mIU/L
Hormones
The pituitary hormone best known for milk production.
Why it matters
Raised levels disrupt periods, fertility and libido in both sexes, and are usually correctable.
Sex Hormone Binding Globulin (SHBG)
nmol/L
Hormones
The protein that binds sex hormones and controls how much is free.
Why it matters
Explains a normal total testosterone with low free testosterone, and shifts with insulin resistance and thyroid function.
Testosterone
nmol/L
Hormones
The principal male sex hormone, also present and important in women.
Why it matters
Drives energy, muscle, mood and libido in both sexes. Low levels have measurable, treatable causes.
Free Testosterone (%)
pmol/L
Hormones
The unbound testosterone your body can actually use.
Why it matters
Often the more meaningful number — total testosterone can look normal while the usable fraction is low.
Free Androgen Index (FAI)
ratio
Hormones
The ratio of total testosterone to SHBG, estimating active androgen.
Why it matters
A key calculation in assessing PCOS and androgen excess in women.
Cortisol
nmol/L
Stress & sleep
Your main stress hormone, following a daily rhythm.
Why it matters
Explains fatigue, weight change and poor sleep. Timing of the sample matters as much as the number.