Turner’s syndrome, also known as congenital ovarian hypoplasia, is a relatively common sex chromosome disorder that is caused by a complete or partial deletion or structural abnormality of the X chromosome. Turner’s syndrome is caused by a complete or partial deletion or structural abnormality of one of the two X chromosomes in girls, while boys have one X chromosome and one Y. Turner’s syndrome actually occurs in girls only. Turner syndrome is a deletion of the X chromosome, so its main manifestation is that girls have a less prominent female expression, a shorter stature, and no breast development at puberty. The internal and external genital areas are more infantile and less developed. In addition, there are different physical abnormalities, such as elbow valgus, etc. Turner syndrome, in fact, is a relatively common sex chromosome disorder and is the only completely monosomal disorder that survives in humans after birth. If a girl is found to have abnormal sex characteristics, it is best to have a karyotype analysis to confirm whether the child has Turner syndrome.