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Prevalence of sex chromosome abnormalities among newborns. a Prevalence of Turner syndrome (TS). Black bars indicates the prevalence of 45,X TS among all TS; b Triple X syndrome (Triple X); c Klinefelter syndrome (KS); and d Double Y syndrome (Double Y) during 1901–2014. Dashed lines indicate the expected prevalence and dotted lines indicate the observed maximum average prevalence of TS, Triple X, KS and Double Y per 100,000 newborn females or males
