LH (Luteinizing hormone)

The LH (luteinizing hormone) lab test measures the amount of luteinizing hormone present in the blood. Luteinizing hormone is produced by the pituitary gland and plays an important role in the development of male and female reproductive system.

Are there any risks associated with this test?

There are no known risks associated with this test.

How should I prepare for this test?

Women who are on birth control pills or other hormone medicines should stop taking them 4 weeks before the test.

What are the causes behind a high LH level in females?

A high luteinizing hormone level in females indicates PCOS, Turner syndrome, and a defect in ovulation.

What are the causes behind a low LH level in females?

A low luteinizing hormone level in females indicates a defect in the pituitary gland, eating disorder, and malnutrition.

Can this test be performed in children?

This test can be performed in children when necessary.

Normal level of luteinizing hormone,

For women in the follicular phase of the menstrual cycle is 1.9-12.5 IU/L.

For women at the peak of the menstrual cycle is 8.7-76.3 IU/L.

For pregnant women is less than 1.5 IU/L.

For women past menopause is 15.9-54.0 IU/L.

For men between the ages 20-70 is 0.7-7.9 IU/L.

For men over 70 is 3.1-34.0 IU/L.

The LH (luteinizing hormone) lab test is done in order to:

Diagnose a pituitary gland disorder,
Diagnose the cause of infertility,
See if a woman is in menopause,
Identify the cause behind an irregular menstrual cycle.

LH (Luteinizing hormone)

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