"Appearing in what I hope is the wake of the worst pandemic this world has seen in over 100 years, there has never been a more timely appearance of a book that provides the full range of evidence for and against most of the major issues that reproductivemedicine specialists face. During this pandemic, we have seen scientific and open debate about how to solve this medical crisis being subjected to political expediency. Dissent by scientists at times has been crushed by autocratic leaders, with honest and open debate the exception and not the rule. We cannot accept the same approach to the many unsolved issues of reproductive medicine. This book has been written by leaders in the field, leaders who I am sure are greatly respected by their patients, in their departments, in their countries and throughout the world, leaders who have strong opinions on how to approach these issues. But on every issue in this book there is a leader who argues for and a leader who argues against. Dear reader, it is up to you to decide who, if either, you will follow"--