LH - Luteinising Hormone

The Luteinizing Hormone (LH) test measures the levels of LH in your blood, an essential hormone for maintaining reproductive health in both men and women. Produced by the pituitary gland, LH plays a key role in fertility, puberty, and the function of reproductive organs.

Why the LH Test is Important

• In Women: LH regulates the menstrual cycle, triggers ovulation, and supports progesterone production needed for pregnancy. This test is often recommended for irregular or heavy periods, fertility issues, PCOS, or to track ovulation.
• In Men: LH stimulates testosterone production, which is critical for sperm production. It’s used to evaluate low sperm count, low testosterone, or signs of hypogonadism like reduced muscle mass or libido.
• In Both: Helps evaluate the pituitary gland function and diagnose hormonal imbalances, including early or late puberty.

When and How the Test is Performed

• Women: Best done on the second or third day of the menstrual cycle.
• Men: Can be done at any time.
• Inform your doctor about any medications you’re taking, like birth control pills, as they may affect results.

What the Results Indicate

Lab results for the LH test can vary based on the laboratory. Abnormal LH levels may signal conditions like PCOS, menopause, hypogonadism, or infertility. This test is often paired with others, such as the FSH test or prolactin test, for a complete reproductive health evaluation.

Consult a Doctor for Accurate Interpretation

Avoid self-diagnosing based on test results. Discuss your medical history and symptoms with your doctor for a comprehensive evaluation. Doctors may recommend lifestyle changes, such as diet and exercise, alongside medical treatments if needed.

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