Luteinizing Hormone Test: LH Levels and Results
Medically reviewed by Medical Advisory Board Last reviewed 2026-08-08
How LH levels help evaluate ovulation, menopause, fertility, puberty, and testosterone signaling
A luteinizing hormone test measures LH, a pituitary hormone that helps regulate ovulation, menstrual cycles, puberty, and testosterone production. LH is usually interpreted with FSH, estradiol, progesterone, testosterone, symptoms, age, and cycle timing.
A luteinizing hormone test measures LH, a pituitary signal that plays a role in ovulation, menstrual cycling, puberty, fertility, and testosterone production. MedlinePlus notes that LH results are interpreted alongside sex, age, symptoms, medical history, and other hormone tests such as FSH.
LH is released in pulses, so its meaning depends on the context. A single LH result can mean very different things during a mid-cycle ovulation surge, in perimenopause, PCOS, pituitary suppression, or male hypogonadism.
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- Irregular or absent periods
- Ovulation timing and fertility evaluation
- Perimenopause or menopause context
- Low testosterone or infertility in men
- Delayed or early puberty
- Possible pituitary or gonadal dysfunction
For women who cycle, timing matters. LH surges near ovulation; FSH and estradiol are often checked early follicular; progesterone is checked mid-luteal.
LH Levels: High vs Low
| Pattern | Possible Meaning | Useful Companion Tests |
|---|---|---|
| High LH in women | Ovulation surge, menopause transition, ovarian insufficiency, PCOS pattern | FSH, estradiol, progesterone, AMH, androgens |
| Low LH in women | Hypothalamic suppression, pituitary issue, stress/low energy availability | FSH, estradiol, prolactin, thyroid, cortisol context |
| High LH in men | Testes not responding adequately | Total T, free T, FSH, SHBG, prolactin |
| Low LH in men | Pituitary/hypothalamic signaling issue or suppression | Total T, free T, prolactin, pituitary evaluation when indicated |
LH, FSH, and Testosterone
In men, LH tells the Leydig cells in the testes to produce testosterone. Low testosterone with high LH suggests primary testicular dysfunction. Low testosterone with low or normal LH suggests secondary hypogonadism, often involving pituitary signaling, obesity, sleep apnea, medications, chronic illness, or stress physiology.
Related: low testosterone, testosterone levels by age, and hormone testing.
Conclusion: Luteinizing Hormone Test Results Need Timing
A luteinizing hormone test is useful when it is tied to the right question: ovulation, menopause, fertility, puberty, or testosterone signaling. Interpret LH with timing, symptoms, and companion hormones rather than as an isolated high or low.
Explore the lab testing hub to connect LH with the rest of your hormone panel.
How to test your hormones at home
You don't need a lab appointment to check your own hormones — a few at-home kits mail you a collection kit and return physician-reviewed results online within days:
Prefer to order direct? The Everlywell Men's or Women's Health hormone test uses a CLIA-certified lab, physician-reviewed results, and prepaid return shipping.
Frequently Asked Questions
What does a luteinizing hormone test show?
It shows the amount of LH in blood. LH helps regulate ovulation in women and testosterone production in men.
Is high LH bad?
Not always. LH is supposed to surge before ovulation. Persistently high LH outside that context can suggest menopause transition, ovarian insufficiency, PCOS patterns, or testicular dysfunction in men.
Should LH be tested with FSH?
Often, yes. LH and FSH are usually interpreted together, especially for fertility, menopause, puberty, and hypogonadism evaluation.
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