LH:FSH Ratio Calculator
Evaluate LH and FSH levels for PCOS and menopause assessment.
LH:FSH Ratio Form
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Understanding Your Results
An elevated LH:FSH ratio (>2:1 or 3:1) is often seen in PCOS. In menopause, FSH rises significantly while LH also increases.
Frequently Asked Questions
What is a normal LH:FSH ratio?
In the early follicular phase, the ratio is typically close to 1:1. A ratio above 2:1 or 3:1 may suggest PCOS.
When should LH and FSH be tested?
They are usually drawn on day 2 or 3 of the menstrual cycle for the most reliable baseline assessment.
Can stress affect LH and FSH levels?
Yes. Acute illness, stress, certain medications, and hormonal contraceptives can temporarily alter pituitary hormone levels.
Is the LH:FSH ratio enough to diagnose PCOS?
No. PCOS diagnosis requires clinical and/or biochemical hyperandrogenism, ovulatory dysfunction, and polycystic ovarian morphology.
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