Total Testosterone

Total testosterone is a vital hormone produced mainly in the testes (males) and in smaller amounts by the ovaries and adrenal glands (females). It supports:

• Muscle mass and strength

• Bone density and health

• Mood regulation and energy

• Red blood cell production

Normal Reference Ranges

• Males

  • Birth–12 months: 0.12 – 0.21 ng/mL

  • Age 7–12 years: 0.03 – 0.68 ng/mL

  • Age 12–16 years: 0.28 – 11.10 ng/mL

  • ≥ 16 years: 1.75 – 7.61 ng/mL

• Females: 0.06 – 0.83 ng/mL

Clinical Significance

• Low total testosterone

  • Men: fatigue, low libido, depression, loss of muscle mass, increased fat

  • Women: rare, but may signal adrenal or ovarian dysfunction

• High total testosterone

  • Women: hirsutism (excess hair), acne, deepened voice, menstrual irregularities

Common Indications for Testing

• Hypogonadism (low-testosterone syndrome)

• Polycystic Ovary Syndrome (PCOS)

• Adrenal gland disorders or tumors

• Pituitary gland dysfunction (males)

• Adrenal hyperplasia (females)

Frequently Asked Questions

1. How is the test conducted?
   A simple blood draw, usually in the morning when levels peak.

2. How should I prepare?
   No special fasting is required, but avoid strenuous exercise beforehand.

3. Can I test at any time?
   Morning samples (before 10 AM) yield the most reliable results.

4. What if my levels are abnormal?
   Your physician will correlate results with symptoms and may order further hormone tests or imaging.

5. Can lifestyle changes impact levels?
   Yes—weight loss, exercise, sleep quality, and stress management all influence testosterone.