The Luteinizing Hormone Blood Test is also known as ICSH, Interstitial Cell-stimulating Hormone and LH. No fasting is required when preparing for this blood test and results are available in one to two days. This online blood test is a convenient, confidential and cheap option for people without a doctor or with no insurance.The main use of of an LH measurement is for evaluating the normalcy of hypothalamic-pituitary-gonadal axis. Measuring the levels of serum gonadotropin helps physicians to distinguish between primary gonadal failure and deficient gonadal stimulation. A Luteinizing Hormone test can also help diagnose pituitary disease, as growth hormone and LH are frequently the first hormones to be affected by this condition. The serum analysis of LH is also helpful in diagnosing and treating infertility in both men and women.