Skip to content

Women's Health

Font Size
A
A
A

Luteinizing Hormone

A luteinizing hormone test measures the amount of luteinizing hormone (LH) in a sample of blood or urine. LH is produced by the pituitary gland.

Why It Is Done

A luteinizing hormone (LH) test may be done to:

  • Help find the cause for a couple's inability to become pregnant (infertility). LH testing is commonly used to help evaluate:
    • A woman's egg supply (ovarian reserve).
    • A man's sperm count.
  • Help evaluate menstrual problems, such as irregular or absent menstrual periods (amenorrhea). This can help determine if the woman has gone through menopause.
  • Determine if a child is going through early puberty (also called precocious puberty). Puberty is early when it starts in girls younger than age 9 and in boys younger than age 10.
  • Determine why sexual features or organs are not developing when they should (delayed puberty).
  • Determine (usually with a urine sample) when a woman is ovulating. Home urine tests for ovulation are available.
  • Monitor a woman's response to medicines given to stimulate ovulation.

How To Prepare

Many medicines, such as cimetidine, clomiphene, digitalis, and levodopa, can change your results. You may be asked to stop taking medicines (including birth control pills) that contain estrogen or progesterone or both for up to 4 weeks before having a luteinizing hormone (LH) test. Make sure your doctor has a complete list of all the prescription and over-the-counter medicines you are taking, including herbs and natural substances.

Tell your doctor if you have had a test that used a radioactive substance (tracer) within the last 7 days. Recent tests (such as a thyroid scan or bone scan) using a radioactive tracer can interfere with LH test results.

1 | 2 | 3 | 4 | 5

WebMD Medical Reference from Healthwise

Last Updated: March 12, 2014
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.

Today on WebMD

hands on abdomen
Test your knowledge.
womans hand on abdomen
Are you ready for baby?
 
birth control pills
Learn about your options.
insomnia
Is it menopause or something else?
 
Couple with troubles
Article
Bone density illustration
VIDEO
 
Young woman being vaccinated
Slideshow
woman holding hand to ear
Slideshow
 

Send yourself a link to download the app.

Loading ...

Please wait...

This feature is temporarily unavailable. Please try again later.

Thanks!

Now check your email account on your mobile phone to download your new app.

Blood pressure check
Slideshow
mother and daughter talking
Evaluator
 
intimate couple
Article
puppy eating
Slideshow