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Table 1 Physical and Medical Features Associated with Trisomy X

From: A review of trisomy X (47,XXX)

Feature Estimated frequency based on current available data[10, 19, 22, 33, 44]
Tall stature >75th percentile 80-89%
Epicanthal folds 32-46%
Clinodactyly 42-65%
Hypotonia in infancy 55-71%
Genitourinary malformations 5-16%
Seizure disorder 11-15%
Intention tremor 6-20%
Congenital hip dysplasia 2-12%
Constipation/Abdominal pains 12-45%
Premature ovarian failure unknown