Premature ovarian insufficiency (POI), by definition, occurs when a woman has her last menstrual period before the age of 40, because of variable, and most often permanent ovarian dysfunction. It presents as hypergonadotropic hypogonadism with peripheral amenorrhea. It has a prevalence of 1-2%, but in women under 20 years its prevalence is one case in every 10,000 women. POI is a devastating diagnosis for women of reproductive age. Many conditions can lead to POI, but it is most commonly idiopathic, and it has a variable clinical presentation. It has serious health consequences, including psychological disorders such as anxiety or depression, infertility, osteoporosis, autoimmune disorders, cardiovascular diseases, and an increased risk of mortality. Continue reading “Diagnosis and Initial Evaluation of Premature Ovarian Insufficiency (POI)”