A New Way to Assess Male Fertility (image) American Chemical Society Share Print E-Mail Caption More sperm travel to the right side of a central channel, which contains high concentrations of progesterone (dark green), than to the left side, which contains lower concentrations (light green). Credit Adapted from Analytical Chemistry 2019, DOI: 10.1021/acs.analchem.9b05183 Usage Restrictions The image may only be used with the appropriate credit. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.