A luteinizing hormone test measures the amount of Luteinizing hormone(LH)present in a sample of your blood. LH is produced in our body by the pituitary gland. In women, LH helps in regulating the menstrual cycle and egg production i.e ovulation. In men, LH stimulates the production of testosterone, which plays its part in sperm production.Its generally done performed to: 1. Detect infertility in both men and women. 2. Diagnose menstrual problems in women. 3. To find a case of early or a late puberty. 4. To see a woman response to medication given for ovulation.