In this second volume, the Biennial Review of Infertility brings together the most up-to-date research and clinical information on male and female infertility, emerging assisted reproductive techniques, and controversial issues in reproductive medicine.  This volume includes discussion of cutting-edge topics such as epigenetics, proteomics, and the role of the environment in fertility, as well as insightful evidence-based discussion of common clinical procedures.  It is the cumulative effort of a preeminent panel of experts presenting each chapter in a clear and well-balanced manner.  Created to provide an ongoing appraisal of current knowledge, the Biennial Review of Infertility stimulates communication amongst all those working to help couples resolve their infertility.