Trusted-source health topic
Understanding Hormone Testing
Hormone tests measure selected chemical messengers in blood, urine, saliva, or another specified specimen.
Why is this important?
Understanding the purpose and limits of laboratory information can support a more informed conversation with a qualified healthcare professional.
How laboratory testing relates
Hormone levels may vary with time, age, sex, medicines, pregnancy, menstrual stage, and health context. A single value may not answer a clinical question alone.
Before testing
Preparation is test-specific. Follow the instructions given for the exact test and contact the laboratory if fasting, timing, medicines, or specimen collection is unclear. Do not stop medicines unless a qualified professional tells you to.
Educationally related laboratory guides
These links explain related laboratory records. They are not recommendations to request or purchase a test.
Sources & further reading
- MedlinePlus, U.S. National Library of Medicine: Estrogen Levels Test
External authoritative patient reference · Verified 2026-08-10
- MedlinePlus, U.S. National Library of Medicine: Testosterone Levels Test
External authoritative patient reference · Verified 2026-08-10