Glossary

What is the LH:FSH ratio?

The LH:FSH ratio compares two hormones from your brain that control your ovaries, luteinising hormone and follicle stimulating hormone. You get it by dividing your LH result by your FSH result, usually from a blood test early in your cycle.

Written by Poshan Labs. Sources are named on the page. Last updated 26 October 2026.

LH:FSH ratio on your report

Indian reports often show LH and FSH separately in mIU/mL, and some print the ratio too.

There is no single agreed cut-off; it varies with the lab's test method. So your doctor will read it with:

  • your symptoms
  • ultrasound
  • other results

LH:FSH ratio: the LH:FSH ratio compares two hormones from your brain that control your ovaries, luteinising hormone and follicle stimulating hormone.

What the LH:FSH ratio tells your doctor

In many women with PCOS, LH runs high compared with FSH, so the ratio goes up.

A study of 267 women found:

  • the average ratio was about 0.7 in women without PCOS and about 1.25 in women with PCOS
  • a higher ratio went along with insulin resistance and more follicles

But the authors concluded the ratio is useful and not diagnostic: many women with PCOS have a normal ratio.

What helps more than chasing the ratio

You do not need to chase the ratio itself. In PCOS, the habits that improve insulin sensitivity are what matter:

  • meals built around dal, vegetables, whole grains and enough protein
  • fewer sweets, sugary chai and maida snacks
  • regular walking and strength exercise
  • slow weight loss if needed
  • good sleep

These often help periods become more regular. Any hormone treatment is for your gynaecologist to decide.

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