. Luteinizing Hormone (LH) is a hormone produced by the pituitary gland.
. In women, LH works alongside FSH to regulate the menstrual cycle and ovulation. A surge in LH levels triggers ovulation, the release of an egg from the ovary. LH testing is commonly used to evaluate ovarian function, diagnose infertility issues, and assess ovulation in women trying to conceive.
. In men, LH stimulates the testes to produce testosterone, which is essential for sperm production. The LH test is used to evaluate testicular function and to diagnose hypogonadism or infertility in men.
. Abnormal LH levels can indicate issues such as PCOS, premature ovarian failure, pituitary disorders, and gonadal dysfunction.

  • Hormones & Endocrinology

Patient Instructions:
. The ideal timing for measuring LH can depend on the specific context and the purpose of the assessment:
# For pre-menopausal women: The best time to test is on day 2-4 (ideally day 3) of the cycle, which is when LH levels are relatively stable and low, or around the mid-cycle (when LH surges).
# For post-menopausal women: LH can be tested at any time.
# For men: The test can be done at any time.
Note: Please consult your doctor regarding the timing and any specific instructions related to your health condition or treatment plan.
. If possible, stop using any medicines that influence LH levels e.g., Steroid, ACTH, Gonadotropin, or Estrogen medications, for at least 48 hours before collection. Oral contraceptives and estrogen replacement therapy may influence LH levels.
Note: Please consult your doctor on which medicine to stop and for how long.
. It is advisable to avoid strenuous physical activity before the test.
Sample Type:
Serum
Result Time:

After 2 hours 30 minutes
After cutoff: 9:00 AM next day

Storage & Transportation:
-
Cutoff Times:

9:30 PM Monday – Saturday
8:30 PM Sunday

30 minutes required for samples arrived at Cao Thang till receive by Laboratory

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