Androstenedione Test: Levels, Results & Meaning

Introduction: The Hormone Behind Common Symptoms

In my clinical practice, I often see patients who are frustrated by symptoms like acne, excess hair growth, or irregular menstrual cycles. While these can stem from various causes, one hormone that frequently comes into play is androstenedione.

What is Androstenedione?

Androstenedione is a steroid hormone produced primarily by the adrenal glands and, to a lesser extent, by the ovaries in women and testes in men. It serves as a precursor to both testosterone and estrogen, making it a key player in the body's steroid hormone pathway.

Why Measure Androstenedione Levels?

Measuring androstenedione helps in diagnosing conditions related to androgen excess or deficiency. It's particularly useful when evaluating hirsutism, acne, virilisation, or suspected adrenal or ovarian disorders.

Common Symptoms That May Prompt Testing

Patients typically present with symptoms such as unexplained acne, male-pattern hair growth in women, hair loss, irregular periods, or in some cases, signs of early puberty in children.

Understanding Your Androstenedione Test Results

Interpreting androstenedione levels requires context, including age, gender, and clinical symptoms. Results are compared to established reference ranges.

Reference Ranges by Age and Gender

Note: Reference ranges can vary between laboratories. Always consult with your healthcare provider for interpretation.

What Does High Androstenedione Mean?

Elevated androstenedione levels often indicate increased androgen production. This can be due to conditions like polycystic ovary syndrome (PCOS), congenital adrenal hyperplasia (CAH), or adrenal tumors.

Is High Androstenedione Dangerous?

While high androstenedione itself isn't typically life-threatening, it can signal underlying disorders that require management. Left untreated, conditions like PCOS can lead to metabolic issues, while adrenal tumors may need surgical intervention.

What Causes Low Androstenedione Levels?

Low levels are less common but can occur in adrenal insufficiency, such as Addison's disease, or due to certain medications. Symptoms might include fatigue, weight loss, and low blood pressure.

Androstenedione in Specific Populations

Androstenedione levels fluctuate in different life stages and conditions.

Androstenedione During Pregnancy

During pregnancy, androstenedione levels naturally increase as part of hormonal changes. However, significantly elevated levels may warrant investigation for conditions like gestational hyperandrogenism.

Androstenedione in Children

In children, abnormal levels can indicate disorders of sexual development or premature adrenarche. Testing is crucial for diagnosing conditions like congenital adrenal hyperplasia early.

How is the Androstenedione Test Performed?

The test involves a simple blood draw, usually from a vein in the arm. No special preparation is typically required, but timing may be important for women, as levels can vary with the menstrual cycle.

Related Medical Conditions

Several conditions are associated with abnormal androstenedione levels.

Polycystic Ovary Syndrome (PCOS)

PCOS is a common endocrine disorder where androstenedione and other androgen levels are often elevated, contributing to symptoms like hirsutism and anovulation.

Congenital Adrenal Hyperplasia (CAH)

CAH is a genetic disorder affecting cortisol production, leading to excess androstenedione and other androgens. It can cause virilisation in females and early puberty in both sexes.

Adrenal Tumors

Benign or malignant tumors of the adrenal glands can secrete androstenedione, causing rapid onset of androgen excess symptoms.

Managing Abnormal Androstenedione Levels

Management depends on the underlying cause. For PCOS, lifestyle modifications and medications like oral contraceptives or anti-androgens are often used. CAH may require corticosteroid therapy, while adrenal tumors might need surgical removal.