LH (Luteinizing Hormone)
Pituitary hormone that triggers ovulation in women and stimulates testosterone production in men. Often interpreted with FSH.
Test Information
Reports In
Same day (6 hours)
Parameters
1
Requisites
Blood Sample
Sample Type
Blood
Measures
Serum LH level
Identifies
Ovulation, PCOS, pituitary disorders, hypogonadism, infertility
What is the LH Test?
Luteinizing Hormone (LH) is a pituitary hormone that triggers ovulation in women and testosterone production in men. The FSH:LH ratio is a key diagnostic criterion for PCOD. LH surge testing is also used to predict ovulation for timing conception.
Why Should You Take This Test?
LH:FSH ratio elevated in PCOS. LH surge triggers ovulation. With FSH, helps diagnose pituitary vs gonadal causes of reproductive dysfunction.
Who Should Get Tested?
PCOD Diagnosis
LH:FSH ratio >2 is characteristic of PCOD.
Ovulation Prediction
LH surge indicates ovulation.
Infertility Workup
Evaluates pituitary-gonadal axis.
Warning Signs — When Should You Get This Test?
Common Conditions Detected
Frequently Booked Together
Tests commonly ordered alongside LH for a complete picture
FSH
LH:FSH ratio is diagnostic for PCOD
Testosterone
If PCOD suspected
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