Light-Dark Cycle Disruption (IMAGE) Cell Press Caption This is an artistic interpretation of how weekly perturbation of the light-dark cycle disrupts estrous cycles in middle-aged female mice. Credit Takasu et al./<i>Cell Reports</i> 2015 Usage Restrictions Credit Required. License Licensed content 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.