What is LH (luteinising hormone)?

LH on your report

Usually reported in mIU/mL, and labs print different ranges for different phases of the cycle and after menopause.

When you read it:

• Note which day of your cycle the sample was taken.
• Read it with your FSH and your doctor's advice.

What LH tells your doctor

LH normally rises sharply just before ovulation, which is what home ovulation kits detect.

What a high LH can mean:

• In women of childbearing age, an LH that stays high can be a sign of PCOS, where it often comes with irregular periods and higher male hormones.
• In your mid-forties and beyond, high LH and FSH are a normal part of approaching menopause.

So the same number means different things at different ages.

What helps when LH runs high

LH itself is not something you manage with food. In PCOS, though, habits that improve insulin often help periods become more regular, such as:

• balanced meals with protein and fibre
• fewer sweets and refined flours
• regular activity
• gradual weight loss if needed

Good sleep and handling stress support your cycle too. Any hormone treatment should come from your gynaecologist.