Luteinizing hormone (LH)

LH is a key hormone in both men and women, sparking ovulation and aiding testosterone production.

📋 About This Biomarker

Luteinizing Hormone (LH) acts like a starter pistol in the race of reproduction, firing off signals that spur important processes in both males and females. In women, LH is crucial for triggering ovulation - the release of an egg from the ovary. It’s the main event in the menstrual cycle, making it possible to conceive. In men, LH stimulates the production of testosterone by the testicles, essential for sperm production and overall virility. Beyond fertility, LH influences energy levels, mood, and physical development.

🎯 Why We Test This

Testing for LH can help unlock answers to various reproductive puzzles, such as irregular menstrual cycles in women or low testosterone levels in men. It's especially important if you're struggling with infertility, experiencing symptoms of hormonal imbalances, or undergoing any fertility treatments. Understanding your LH levels can guide appropriate interventions to help balance your hormonal health.

⚠️ What Affects It

Factors that can influence LH levels include age, stress, body weight, and general health. Hormonal contraceptives and hormone replacement therapy can significantly alter LH levels. Conditions like PCOS, hypopituitarism, and disorders of the hypothalamus can also affect LH production.

📈 How to Improve

Managing LH levels typically involves addressing the underlying causes of the imbalance. If levels are high or low, hormone therapies or changes in medication might be necessary. Lifestyle changes such as improved diet, regular exercise, and stress management can also help regulate hormone levels. Regular monitoring with a healthcare provider is crucial to effectively manage and treat any underlying conditions.

📊 Understanding Your Results (IU/L)

Low (< 2 IU/L)
Low LH levels can lead to decreased reproductive function, affecting everything from menstrual cycle regularity in women to testosterone production in men. This may result in symptoms like decreased libido, infertility, and in some cases, decreased physical characteristics associated with sex hormones, such as reduced body hair.
Optimal (2 - 12 IU/L)
Normal LH levels indicate a well-functioning reproductive system. In women, it means regular ovulatory cycles, and in men, it suggests effective testosterone production. This balance is crucial for not only fertility but also maintaining good bone density, muscle strength, and overall well-being. LH levels nearing the upper range might not immediately cause symptoms but could suggest the early stages of a hormonal imbalance. It’s a good idea to monitor these levels closely, as they could eventually lead to reproductive or metabolic issues. LH levels that are just above the low end can indicate underactivity in reproductive hormone production, which might lead to weakened fertility signals in both sexes. For women, this might manifest as less frequent ovulation, and in men, it could result in reduced testosterone levels.
High (> 12 IU/L)
Elevated LH levels can be a sign of conditions that disrupt normal reproductive functions, such as polycystic ovary syndrome (PCOS) in women, where ovulation is infrequent or absent. In men, high LH might indicate that the testes are not responding adequately, possibly due to injury or an underlying genetic condition.
Also known as: LH