Labels:text | screenshot | black | black and white | document OCR: owth rate To establish normal growth, a normal rowth rate must be demonstrated. To establish the of a child, height should be measured o period of different occasions that are separated by lish a time. The length of time needed to esta normal growth velocity depends upon e accuracy increment that might be expected and th le type of the equipment used, Instruments of mately shown in Fig. 14.7 would require appro e of the three years to establish normality becau high error margin when using them.