Turner syndrome is a genetic disorder that includes a broad spectrum of features that vary in individuals, but usually have the common findings of short stature and loss of ovarian function. The loss of ovarian function usually leads to infertility and inhibited sexual development.

Turner syndrome only occurs in girls and women. Females normally have two X chromosomes. Turner syndrome is most commonly caused by a missing X chromosome. It is usually sporadic, meaning that it is not inherited from a parent. In rare cases, a parent silently carries rearranged chromosomes that can result in Turner syndrome in a daughter. This is the only situation in which Turner syndrome is inherited.