Androstenedione Test – Detailed Guide

The Androstenedione Test measures the level of androstenedione, a steroid hormone that serves as a precursor to testosterone and estrogen. It is mainly produced by the adrenal glands, ovaries (in females), and testes (in males). This test is used to evaluate hormonal imbalances, adrenal gland function, and disorders affecting sexual development and reproduction.

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Why is the Androstenedione Test Done?

✅ To Evaluate Adrenal Gland Disorders:

• Congenital Adrenal Hyperplasia (CAH) – A genetic disorder causing excess androgen production
• Adrenal tumors – Can lead to abnormal hormone levels
• Cushing’s Syndrome – Excess cortisol affecting hormone balance

✅ To Diagnose Hormonal Imbalances in Females:

• Polycystic Ovary Syndrome (PCOS) – A common cause of excess androgens in women
• Hirsutism (Excess Hair Growth) – Can be caused by high androgens
• Virilization (Masculinization Symptoms) – Includes deep voice, male-pattern baldness, and increased muscle mass

✅ To Assess Sexual Development in Children:

• Precocious (Early) Puberty – If puberty starts too soon
• Delayed Puberty – If puberty is abnormally late

✅ To Monitor Androgen-Producing Tumors:

• Ovarian or Testicular Tumors – Can cause abnormal androstenedione levels

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Test Procedure

🩸 Blood Sample Collection:

• A blood sample is drawn from a vein
• Fasting is NOT required
• Best performed in the morning (when hormone levels are highest)
• For women: The test is often done on day 2–5 of the menstrual cycle for accuracy

📅 Results Time:

• Typically available in 2–5 days

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Normal Androstenedione Levels

🔹 Reference ranges may vary slightly by laboratory.

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What Do Abnormal Androstenedione Levels Mean?

🔴 High Androstenedione Levels May Indicate:

• Polycystic Ovary Syndrome (PCOS)
• Congenital Adrenal Hyperplasia (CAH)
• Adrenal or ovarian tumors (in females)
• Testicular tumors (in males)
• Cushing’s Syndrome
• Precocious (Early) Puberty in Children

🟢 Low Androstenedione Levels May Indicate:

• Adrenal insufficiency (Addison’s disease)
• Ovarian or testicular failure
• Late or delayed puberty

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Next Steps If Androstenedione Is Abnormal?

🔬 Further Tests May Be Needed:

• DHEA-S & Testosterone Tests – To assess overall androgen production
• Cortisol & ACTH Tests – To check adrenal gland function
• LH & FSH Tests – To evaluate reproductive hormone balance
• Ultrasound or CT Scan (Adrenal, Ovaries, or Testes) – If tumors are suspected

✅ Treatment Depends on the Underlying Condition

• For PCOS: Lifestyle changes, hormonal therapy (birth control pills, anti-androgens)
• For CAH: Steroid medications to balance hormones
• For Tumors: Surgery, radiation, or hormone therapy