Sex hormone disorders, also known as reproductive hormone disorders, significantly affect the quality of life and cause various symptoms. For example, it may lead to infertility and reduced libido. Both females and males have estrogen and testosterone; however, the levels differ in both genders. Males have a high testosterone level, while females have a high estrogen level. The parathyroid glands are situated behind the thyroid gland. It helps regulate the balance of calcium in the blood.