In this paper we make a effort to search different type research work and Proposed approaches suggested by them regarding uterine contraction, HilbertHuang Transform (HHT),which has been use already successfully. And it is useful engineering field. But during the survey the is no unique method to for identifying the pain occurs for pregnant women is real labor pain or some other hence we are going to study the systems and their results available so that it will be beneficial for othes. We study many things like temporal energy of frequency in distribution form for localizing events in time-frequency space.

Keywords : MMG, EMD, HHT, Uterine Contraction.