[en] Ab initio effective interactions are very crucial to explain nuclear structure properties of unstable nuclei. If one is able to choose an effective Hamiltonian and model space, it is possible to learn more about low lying energy states, in between transitions and spectroscopic factors. Spectroscopic factor strengths (S) have been one of the main tools to be used to know the structural factors of initial and final nuclei of a transfer reaction. It can relate experimental cross section of a reaction and cross section calculated through Distorted Wave Born Approximation by this S factor. In this present work, shell model calculations for one nucleon transfer reactions have been done for the sd shell i.e. Z=8-14. Used herewith 'In Medium Similarity Renormalization' as the main tool and compared that with results from USDB approach and experimental values to know which approach works better