A computer simulation of stable crack growth in ductile material is carried out using elasto-plastic finite element method based on incremental theory of plasticity. Values of δ (load line displacement) and Δa (amount of crack growth) obtained from the experiment of compact tension specimens (material : SCM4) are used as inputs in the simulation. Various fracture parameters proposed are investigated as the crack grows. The value of M-integral, applied so far only to static problem is evaluated as the crack grows and its path-independence is checked. The effect of unloading widely used for the evaluation of the crack length in single specimen experiment is studied in this simulation. A new numerical method to find out the point of onset of the crack growth is proposed here.