SummaryTypical case of Turner’s syndrom is reported. Diagnosis is based on the following signs :1°dwarfism ;2°ovarial agenesia ;3°congenital abnormalities and specially a webbed neck.1°Dwarfism is harmonious ; it seems that prepuberty growth has been delayed. Lightly delayed bone development is shown by XRay study. Neither starvation, nor a definite disease of the bones, nor thyroid, nor pituitary disturbances account for dwarfism. Two other possible factors are suggested : either congenital abnormalities of the epiphyseal cartilage or lack ofœstrogenic factor.2°Examination of vaginal smears reveals a picture in agreement with the diagnosis of ovarial agenesia. Hypopituitarism is ruled out by an increased urinary excretion of folliculin secreting hormone : a fact that may be given as a necessary feature of the disease.3°Other abnormalities observed in this case are : webbed neck, epicanthus, nœvi and supernumerary teeth.Oestrogens given by mouth resulted in increased feminisation of the patient features.