female reproductive organ morphological measurement placenta measurement placenta morphological measurement 2014-01-24T19:23:54Z Any measurement of the physical form or structure of the placenta, the membranous vascular organ in female mammals that permits metabolic interchange between fetus and mother. It develops during pregnancy from the chorion of the embryo and the decidua basalis of the maternal uterus and is expelled following birth. CMO:0002086 JSmith clinical_measurement_ontology