Turner syndrome (TS) only occurs in females and is present from the time of conception. It describes a set of features which occur when a female has only one complete X chromosome in each cell. The second X chromosome may be missing entirely or may be incomplete. See below to read more about chromosomes and the abnormality present in Turner syndrome.
This is a companion discussion topic for the original article at https://patient.info/childrens-health/turner-syndrome-leaflet