Background, Motivation and Objective Obstetric pathologies associated with placental dysfunction correspond to an important public health issue. In the case of intrauterine growth retardation (IUGR), significant changes in the villous architecture of IUGR placentas compared to normal placentas are observed, most likely changing the absolute value of viscoelasticity, but also its relationship with frequency. To this day, there have been a few studies of the placentas biomechanical properties, but no clinical device provides information about its elasticity or architecture. The frequency behaviour of tissue mechanical parameters may be modeled as a power law, in which case the exponent parameter represents a mechanical property inherent to a given material. In this context, the feasibility of measuring shear wave dispersion in placentas is tested ex vivo.