University of Toronto (External organisation)

  • Nosrati, R. (Inventor)
  • Max M. Gong (Inventor)
  • David Sinton (Inventor)

Activity: Industry, Government and Philanthropy Engagement and PartnershipsPatentsPatent


Devices and methods for quantification of male fertility

Abstract: Disclosed herein is a low cost and rapid microfluidic based method and test device for quantifying male fertility potential. The device can simultaneously measure three critical semen parameters rapidly, namely live sperm concentration, motile sperm concentration, and sperm motility. The device includes a transparent substrate and a top sheet with two holes therethrough and an intermediate sheet sandwiched between the substrate and the top sheet. The wells formed by holes form a concentration measuring well (C) and a motility well (M) formed by the top sheet with these two holes bonded to the intermediate sheet. A colorimetric agent is located on the top surface of the intermediate sheet at the bottom of each well which changes color when in contact with sperm. In the motility well a porous membrane is located on top of the colorimetric agent and a liquid buffer may be placed on the top surface of the porous membrane. Applying part of a sperm sample to the C well results in direct contact of any live sperm with the colorimetric agent causing a color change, applying part of the sperm sample to the M well results in live sperm with sufficient motility to swim vertically down through the liquid buffer and through the porous membrane to the colorimetric agent. Evaluating the intensities of the color change of the colorimetric agents before and after contact with the sample gives a measure of total concentration of live sperm and motile sperm from which sperm motility is calculated.

US20180348207A1 - United States
Period6 Dec 2018
Held atUniversity of Toronto, Canada, Ontario
Degree of RecognitionNational