Morphometry Morphometry (the measurements of form) is an objective and reproducible procedure which can be used to measure and interpret tissue features and assist the diagnosis when subjective evaluation is difficult and gives indefinite results. Morphometry of 2-dimensional tissue sections can also be used to provide information on the 3 dimensional spatial structure or organization (referred to as stereology) of tissue. Stereology and morphometry are closely related and often used interchangeably. Visual perceptions do not always reproduce physical reality. This is due to the illusory effects when viewing histological sections, as the tissue architecture or structures in which cells are located or surrounded can lead to errors in perceptual judgment. This is especially true in placenta due to complex arborization of Terminal Chorionic Villi and their arrangement in relation to the intervillous space.