LH

Luteinizing hormone (LH) testing is available at IntroLab in Belgrade, a facility specializing in hormone analysis and laboratory diagnostics.

What is Luteinizing Hormone?

Luteinizing hormone is one of the important hormones in the body, playing a significant role in regulating the reproductive system. This hormone is produced in the anterior part of the pituitary gland, a small gland located in the brain. LH is essential for the normal functioning of the reproductive organs in both men and women.

Why is LH Measured?

LH testing serves as a diagnostic tool to evaluate reproductive function and detect potential hormonal imbalances. It is recommended for individuals with fertility problems, menstrual cycle irregularities, irregular ovulation, or suspected polycystic ovary syndrome. In men, measuring LH levels can help assess sperm production and testicular function.

Reference Values

Normal LH levels can vary based on gender, age, and the phase of the menstrual cycle in women. In women of reproductive age, LH levels are typically low during the early part of the cycle, rise during ovulation, and peak at high levels. In men, LH levels are generally stable and show less variation.

When is it Tested?

LH testing is usually conducted at specific points in the menstrual cycle for women to ensure accurate interpretation of results. A blood sample is taken from a vein, and the timing of this sample depends on the purpose of the test and the individual patient’s circumstances. It is important to follow the doctor’s or lab technician’s instructions regarding the correct timing for sample collection.

Low Levels

Low levels of luteinizing hormone can signal certain health issues or pituitary gland dysfunction. Causes may include polycystic ovary syndrome (PCOS), stress, low body weight, or intense physical activity. Low LH levels can lead to ovulation disorders, irregular menstrual cycles, or decreased production of estrogen or progesterone in women.

High Levels

High levels of luteinizing hormone can indicate various conditions or disorders. In women, high LH levels may be linked to lack of ovulation, premature ovarian failure, or menopause. In men, high levels might suggest reduced testosterone production or testicular function issues. Additional testing and result interpretation are typically necessary to make an accurate diagnosis.

Preparation for the Test

Before your blood sample is taken it’s important to follow the instructions given by your doctor or laboratory technician. Sometimes, fasting may be necessary before the test. Additionally, make sure to inform the healthcare provider about any medications or supplements you are taking, as they may influence the test results.