Luteinising Hormone (LH)
Hormones blood
What It Is
LH is a pituitary hormone that triggers ovulation in women and stimulates testosterone production in men.
Why It Matters
LH is key for assessing fertility, menstrual irregularities, and pituitary function.
If Levels Are High
Elevated LH in women may indicate PCOS, menopause, or a pituitary disorder.
If Levels Are Low
Low LH may indicate pituitary insufficiency or be suppressed by medications.
Preparation
Women: best measured on day 2–5 of the menstrual cycle.
How Often to Test
As clinically indicated for fertility or hormonal assessment.
Important Disclaimer
This information is for educational purposes only and does not constitute medical advice or diagnosis. Results should be interpreted in clinical context by a qualified healthcare professional. If you have severe symptoms or urgent concerns, seek urgent medical help.