LH Test (Luteinizing Hormone)
A core hormone in ovulation and testosterone production, measured directly.
LH is the signal hormone: in women it triggers ovulation, in men it tells the testes to produce testosterone. When something is off in either system, LH is one of the first numbers worth seeing.
What it tells you: whether the pituitary is signaling normally. In women, LH read alongside FSH helps explain irregular cycles, suspected PCOS, or perimenopause. In men, LH separates a testicular cause from a pituitary one when testosterone is low, which changes what happens next.
Who orders it: women with irregular or absent cycles, people evaluating fertility, men with low testosterone results who need to know why, and anyone whose provider asked for the level.
How it works: order online, walk in, about five minutes. Results usually in 1-2 business days.
Fasting: not required. Women tracking a cycle should ask their provider which day to draw.
Frequently Asked Questions
Does timing in my cycle matter?
Should I test FSH too?
I am male. Why would I need LH?
Pairs Well With: Same Blood Draw
Test centers don’t accept payment. You pay securely here; the lab just does the draw.
What happens after you order?
- 1Your lab order form & test code appear in your secure online account, with your test center’s address.
- 2We send your lab requisition to the test center electronically.
- 3Walk in & get tested. Tests usually take 5 minutes or less.
