Androstenedione blood test: how to read your result

Androstenedione is an androgen precursor made by the adrenal glands and gonads. The body can convert it into testosterone and into oestrogens, which is why it is read alongside testosterone, DHEA-S, LH/FSH, 17-OH progesterone, cortisol and any clinical context rather than on its own.

Androstenedione is most useful as part of an androgen panel — together with total and free testosterone, DHEA-S, SHBG, 17-OH progesterone and (in females) LH/FSH and cycle context. Timing matters: in menstruating individuals the value can shift with cycle phase, and morning samples are usually preferred because adrenal output follows a daily rhythm. Persistent elevation, especially with symptoms, is typically followed up with dynamic testing (such as ACTH stimulation) rather than a single value.

A high androstenedione can appear with adrenal or ovarian hormone patterns, PCOS-like patterns, certain enzyme-pathway differences (such as those involving 17-OH progesterone), or other endocrine contexts. Because androstenedione is a precursor that can move with several upstream signals, the value is interpreted with the rest of the androgen panel and any symptoms. One result alone cannot diagnose a condition.

A low androstenedione can relate to adrenal or gonadal output, age (levels naturally fall with age), certain medications, or the broader hormonal picture. It is usually interpreted together with DHEA-S, testosterone and the pituitary signals (LH, FSH, ACTH) rather than on its own. Reference ranges vary by lab, sex and age; a single low value is reviewed in context.

Note time of day and (if relevant) menstrual cycle phase — both shift androstenedione meaningfully. Read alongside total/free testosterone, DHEA-S, SHBG and 17-OH progesterone for context. A single mildly raised value is often rechecked or followed up with dynamic testing rather than acted on alone