Hormonal causes are probably the most common causes of recurrent miscarriages. They relate to more than a third of these cases. Thyroid disorders like hypothyroidism or less often hyperthyroidism, disorders of glucose metabolism such as hypoglycemia, hyperinsulinemia and hyperglycemia, as well as prolactinomas may easily lead to the loss of pregnancy usually in the first trimester. Therefore such cases should be treated in a coordinated way by a team of therapists including gynecologist, endocrinologist, nutritionist and psychologist in order to receive the best treatment.