What Is a Basal Hormone Test?
A basal hormone test measures key reproductive hormones in the blood, typically taken on day 2–4 of the menstrual cycle. These hormones reflect ovarian function, egg reserve, and overall reproductive health. The test often includes:
- FSH (Follicle-Stimulating Hormone) – Stimulates follicle growth in the ovaries.
- LH (Luteinizing Hormone) – Triggers ovulation and supports early pregnancy.
- Estradiol (E2) – A form of estrogen that regulates the menstrual cycle and prepares the uterine lining.
- AMH (Anti-Müllerian Hormone) – Indicates ovarian reserve and potential egg quantity.
When Is It Needed?
The basal hormone test is commonly performed to:
- Assess fertility potential in women planning pregnancy
- Diagnose ovarian reserve issues or early menopause
- Investigate irregular periods or suspected ovulation disorders
- Guide IVF or fertility treatment protocols
- Monitor response to ovarian stimulation in fertility cycles
Procedure Overview
- Timing – Blood sample taken early in the menstrual cycle (day 2–4).
- Sample Collection – A small blood sample is drawn from the arm.
- Laboratory Analysis – Hormone levels are measured and compared with normal ranges for age and cycle phase.
- Interpretation – Results are reviewed by a fertility specialist to determine reproductive health and treatment options.
Key Points
- Non-invasive – Simple blood draw, no anesthesia required.
- Critical for fertility planning – Helps tailor fertility treatments to individual hormonal profiles.
- Best performed early in cycle – Ensures accuracy and consistency of results.