Infertility is an extremely common disorder. In the past fifteen years, the treatment of infertility has undergone dramatic change, with diagnosis and therapy becoming much more specific and targeted. Many procedures that were once experimental, such as in vitro fertilization, are now available on a routine basis and offer excellent success rates with rapidly diminishing risks of multiple births. We hope that this book, which is the result of our combined clinical and research experience as well as that of our contributing colleagues, will serve as your comprehensive, modern guide to dealing with infertility and the many facets of its treatment.Throughout this book we have stressed the fact that, in order to enhance the results of therapy, it is essential that you do not delay in having a complete initial investigation followed by targeted, specific therapy under the guidance of a specially trained physician. Delay in the diagnosis or treatment of infertility is a significant mistake that can dramatically reduce your chances of a successful pregnancy. Remember that seeking appropriate care as soon as possible will allow you to achieve the best results as quickly as possible with the least expense. We have called this approach, aimed at achieving a successful pregnancy in the least amount of time in the most cost-effective manner, the Fast Track to fertility. Each couple must choose the best option that is consistent with their values and ethical beliefs while trying to beat the biologic clock. We wish you and the thousands of other couples struggling with infertility the best of luck.