Why is the karyotype for people with turner syndrome written as 45xo

The number 45 means that the subject has 44 normal autosomal chromosomes (22 chromosomes pairs) plus one (1) good sex chromosome (out of the normal homologous pair). The X0 means that the subject, usually a female, lacks one sister chromosome of the homologous X chromosome pair, or has a partial X sister chromosome.

i think that is new experiments yield untrustworthy data and should be carefully considered, because you don't know what will happen with the experiments.