Anti-Müllerian Hormone (AMH)

What is Anti-Müllerian Hormone?

Anti-Müllerian Hormone (AMH) is a protein hormone produced by cells in developing egg follicles. It serves as the most reliable marker of ovarian reserve — essentially how many eggs a woman has left. AMH levels remain relatively stable throughout the menstrual cycle, making it an ideal test for fertility assessment.

Why is it Tested?

Doctors order AMH to evaluate fertility potential, particularly when planning pregnancy or fertility treatments. It’s also used to assess ovarian function, predict menopause timing, and evaluate certain ovarian conditions like PCOS where AMH levels may be elevated.

Normal Ranges

Reference ranges vary by lab and age. General adult guidelines for women:

Ages 18–35: 1.0–3.5 ng/mL
Ages 36–45: 0.5–2.5 ng/mL
Post-menopause: <0.5 ng/mL

AMH naturally declines with age as ovarian reserve decreases.

Reference ranges vary by authority. Track yours across multiple standards with automatic unit conversions in LabsVault.

What do Abnormal Results Mean?

Abnormal results are not a diagnosis. Always discuss your results with a qualified healthcare provider before making any medical decisions.

Low AMH

Low levels may indicate:

Diminished ovarian reserve
Approaching menopause
Primary ovarian insufficiency
Previous ovarian surgery or chemotherapy

High AMH

Elevated AMH levels may suggest:

Polycystic ovary syndrome (PCOS)
Multiple follicle development
Certain ovarian tumors
Delayed menopause

How to Track Over Time

AMH provides a snapshot of current ovarian reserve, but tracking levels over time reveals the rate of decline. A rapid decrease may prompt earlier fertility planning, while stable levels provide reassurance about reproductive timeline.

Anti-Müllerian Hormone