Luteinizing Hormone (LH) is a hormone secreted by the pituitary gland that plays an important role in both male and female bodies. Its main function is to promote the synthesis and secretion of sex hormones in the ovaries and testes, thereby regulating the reproductive cycle and gonadal function. LH antibodies refer to antibodies produced in the human body that can inhibit the biological activity of LH. LH antibodies may cause disorders of the reproductive cycle, gonadal dysfunction, infertility, and other problems. LH antibody testing can be used to determine the cause of these problems and help doctors with diagnosis and treatment.