Turner syndrome is a genetic condition that affects girls where one of the two X chromosomes is missing or partially missing. It occurs in around 1 in 2,500 live female births. Girls with Turner syndrome are shorter in height and may experience a variety of health issues such as heart problems, kidney problems, low set ears, skin moles, and celiac disease. However, with growth hormone treatment and medical care, girls can live healthy lives and are otherwise similar to their peers.