sperm count to epididymis weight ratio calculated daily sperm count daily sperm count to epididymis weight ratio 2013-06-10T18:18:48Z A calculated measurement in which the total number of sperm, i.e. mature male germ cells, produced by an individual in a 24 hour period, is divided by the weight, i.e., the heaviness, of the epididymis, the coiled, elongated, cordlike structure located along the posterior border of the testis which provides for storage, transit, and maturation of spermatozoa. The result of this division is presented as a ratio, fraction, quotient or percentage, thus normalizing sperm count to the size of the epididymis and, by extension, to the size of the organism. CMO:0001611 JSmith VT:0002673 clinical_measurement_ontology daily spermatozoa count to epididymis weight ratio