LH in Serum

Pituitary LH stimulates testicular testosterone production in men. In women, it supports ovarian steroid production and triggers ovulation. LH distinguishes primary from secondary hypogonadism.
Also known as:
Luteinizing hormone
S-LH
Lutropin
ICSH
.

LH ranges for

Interpret your result
"Normal" lab range for LH is between 1.7 and 8.6 IU/L for males:
1.7
8.6
According to Peter Attia, LH should be between 1.7 and 8.6 IU/L for males:
1.7
8.6
According to OptimalDX, LH should be between 1.5 and 6.15 IU/L for males:
1.5
6.15
Optimal range
Optimal range for LH appears to be between 1.7 and 7 IU/L for males:
0
1.7
7
8.6
25
Why this optimal range?
Preliminary range is based on functional health organizations including but not limited to those listed above.
Your interpretation
For low
For high

Common reasons for high LH:

  • High LH usually reflects reduced gonadal feedback.

    In men, it suggests primary testicular dysfunction when testosterone is low, and may indicate compensated / subclinical primary hypogonadism when testosterone is still normal. Causes include Klinefelter syndrome, orchitis, testicular injury, chemotherapy or radiation, and anorchia.

    In women, LH must be interpreted in the context of cycle phase and menopausal status: it normally rises around ovulation and is commonly elevated after menopause. Persistently high LH outside the expected physiologic setting may be seen with reduced ovarian function, including primary ovarian insufficiency; PCOS may show relatively increased LH, but LH:FSH ratio is not a diagnostic criterion on its own.

    ,

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Zsolt Szabo
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