Hormones
LH
LOINC 10505-6 · UI/L
What it is
LH (luteinizing hormone) is made by the pituitary gland. It triggers ovulation in women and supports testosterone production in men.
Why it matters
It is central to fertility evaluation and to understanding the menstrual cycle and reproductive hormones.
What high values can mean
A higher value can reflect reduced ovarian or testicular function, or the natural surge that triggers ovulation.
What low values can mean
A lower value may relate to a pituitary or hypothalamic issue affecting hormone signalling.
How to improve it
LH reflects reproductive physiology and is not changed by lifestyle; interpretation depends on your context.
Food & lifestyle
No specific food changes LH; general healthy habits support reproductive health overall.
Preparing for the test
Timing matters in menstruating women — note your cycle day; follow your lab's instructions.
When to talk to a doctor
Discuss abnormal LH with a doctor for fertility concerns or irregular cycles.
Related markers
Sources
- MedlinePlus (NIH)
- Testing.com (AACC)
Content reviewed on June 26, 2026
Medical disclaimer
This content is for educational purposes only. It is not medical advice and does not diagnose, treat, or prevent any condition. Reference ranges vary between laboratories — always use the range printed on your report and discuss your results with a healthcare professional.
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