Introduction: Luteinizing hormone (LH) in synergy with follicle stimulating hormone (FSH) stimulates follicular growth and ovulation. It plays a key role in gonadal function. It controls the length and sequence of the female menstrual cycle, including ovulation, preparation of the uterus for implantation of a fertilized egg, and ovarian production of both estrogen and progesterone. Disorders often associated with high endogenous LH secretion are Polycystic Ovary Syndrome (PCOS), menstrual cycle disorders, infertility and high rates of spontaneous abortion.