Aim. Considering complexity of the Graf’s method in the everyday clinical practice, the purpose of this study was to develop a simplified ultrasound analysis of the infant’s hip, based on Graf’s method that relies on use of the newly introduced parameter, named “L value”, on which the simplified method is based. Methods. We analyzed 508 ultrasonografic images of the hips in infants aged 4 weeks to 6 months. The images were first evaluated using the Graf measurements. On the same images, we define the new parameter that we named “L value". The threshold values of the new “L value” were identified. Those values were then used in order to re-classify the hips in three simplified groups: group of haelthy, displastice and decentered hips. Inter-observer agreement was estimated by Cohen’s Kappa coefficient. Results. The threshold values for “L value” between Graf groups Ia/Ib was 0.46, between Ib/IIb was 0.68 and between IIb/IIc was 0.92. The correlation analysis between the Graf’s classification and the values of the “L value” was performed and was proved to be statistically significant; r=0.49; p<0.001. After simplifying the Graf’s classification in to three newly defined groups of patients depending on the degree of hip development, correlation coefficient was much higher r=0.94, r2=0.88, for p<0.001. Inter-observer agreement was moderate for Graf analysis and substantial for L value. Conclusions. The new “L value” changes proportionally with the hip maturity. By using the “L value” it is possible to perform a fast, simple, reliable and unbiased evaluation for developmental dysplasia of the hip. According to a new L value it is possible to build a new simplified classification of the developmental dysplasia of the hip applicable in everyday clinical praxis