What is the normal value for luteinizing hormone (LH)?
Aug 24, 2022
Source: Cainiu Health
Dr. Lv Aiming
Introduction
Male: 2–7.8 U/L
Female:
- Follicular phase: 0.65–15 U/L
- Luteal phase: 0.61–16.3 U/L
- Ovulatory phase: 21.9–56.6 U/L
- Menopausal phase: Test results reflect the reference range for the follicular phase, indicating baseline hormone levels.
Luteinizing hormone (LH) is a hormone secreted by women that plays a crucial role in female fertility. Abnormal LH levels—either too high or too low—can impair reproductive function and potentially lead to infertility.
What Are the Normal Reference Ranges for Luteinizing Hormone?
Men: 1.2–7.8 U/L
Women:
Follicular phase: 1.65–15 U/L
Luteal phase: 0.61–16.3 U/L
Ovulatory phase: 21.9–56.6 U/L
Menopausal phase: 14.2–52.3 U/L
The normal range of LH is not constant but fluctuates cyclically throughout the menstrual cycle. For accurate assessment, blood sampling is typically performed on day 2 of the menstrual cycle to measure baseline LH levels, which reflect follicular-phase hormone concentrations.
Risks of Low LH: In women with low LH levels, the endometrium fails to shed at the appropriate time during menstruation. Prior to menses, the endometrium remains in the early secretory phase, exhibiting poor secretory response. Glandular architecture appears mildly tortuous, contributing to impaired implantation and infertility. Some patients with low LH may experience menstrual disturbances, including shortened cycles, menorrhagia, polymenorrhea, or prolonged menstruation (lasting up to 9–10 days or longer), causing significant discomfort.
Caution: Hormonal medications may exacerbate pre-existing endocrine imbalances. Excessive use of such agents can complicate treatment and hinder recovery. We hope this information is helpful to you! Wishing you optimal health and well-being!
