LH (Luteinizing Hormone) – LH is a pituitary hormone that triggers ovulation in women and testosterone production in men.
What LH measures
LH measures reproductive signaling; the LH surge marks ovulation, and levels help assess fertility and hormonal balance.
Typical ranges
Values depend on sex and cycle phase; labs provide phase-specific ranges. LH peaks sharply at ovulation. Reference ranges differ between laboratories and by age and sex, so always read your result against the range printed on your own report.
What high results can mean
In women, can relate to PCOS or menopause; in men, can indicate testicular dysfunction.
What low results can mean
Can reflect a pituitary or hypothalamic issue.
How the test is done
A blood sample, timed to the cycle when assessing ovulation. At-home collection works well for this marker when the sample is processed by a certified lab.
FAQ
What is a normal LH level?
Values depend on sex and cycle phase; labs provide phase-specific ranges. LH peaks sharply at ovulation. Your ideal target depends on your age, sex, and health history, so review results with a clinician.
What does a high LH result mean?
In women, can relate to PCOS or menopause; in men, can indicate testicular dysfunction.
Can I test LH at home?
Yes. A blood sample, timed to the cycle when assessing ovulation. An at-home sample processed by a certified lab gives reliable results.
This article is educational and not a substitute for medical advice. Discuss your results with a qualified clinician.