As the diversification of the electromagnetic (EM) environment is spreading, it is essential to estimate the EM exposure in the mother's body and her fetus for pregnant women under various situations. This paper presents the development of the numerical model of a 7-month pregnant woman (composed of 56 organs, which includes inherent organs of pregnant woman) based on the high-resolution whole-body voxel model of a Japanese adult woman. Moreover, an EM dosimetry by the mobile radio terminals is performed using the developed model.