Скачать или смотреть Luteinizing Hormone LH ; Definition, Functions in body, Low levels, High levels

Luteinizing Hormone (LH) is a key hormone in the reproductive system, acting like a biological spark that triggers ovulation and testosterone production. Let’s break it down:

🧬 What Is LH?
LH is produced by the pituitary gland in the brain.

It works alongside follicle-stimulating hormone (FSH) to regulate sexual development and fertility.

In females, it drives ovulation and supports progesterone production.

In males, it stimulates the Leydig cells in the testes to produce testosterone2.

🌙 LH in Females
Follicular Phase: LH helps mature ovarian follicles.

Ovulation: A surge in LH triggers the release of an egg.

Luteal Phase: LH supports the corpus luteum, which produces progesterone to maintain early pregnancy2.

💪 LH in Males
LH binds to Leydig cells in the testes.

This stimulates testosterone production, which is essential for:

Sperm production

Muscle growth

Deepening of voice

Libido2

📊 Normal LH Levels
Group LH Range (IU/L)
Women (follicular phase) 1.37 – 9
Women (ovulation) 6.17 – 17.2
Women (luteal phase) 1.09 – 9.2
Women (post-menopause) 19.3 – 100.6
Men 1.42 – 15.4
LH levels fluctuate with age, sex, and menstrual cycle phase.

⚠️ When LH Is Abnormal
High LH:

May indicate PCOS, menopause, or gonadal failure.

Low LH:

Could signal pituitary gland issues, delayed puberty, or hypogonadism3.

🧪 LH Testing
Done via blood test or urine ovulation kits.

Often paired with FSH to assess fertility or diagnose hormonal disorders4.

#Luteinizing #Hormone