How long do I need to wait between IVF cycles? Is it better to take a break between IVF cycles? What is the time I should wait between fertility treatments? These are all questions that fertility specialists get asked quite frequently. Dr. Marcy Maguire, a reproductive endocrinologist at RMA, answers all of your questions.   I had an unsuccessful IVF or IUI treatment cycle. Should I wait some time before trying to conceive again or should I try sooner rather than later? Our approach is to carefully evaluate every unsuccessful cycle and optimize the next one. What kind of treatment cycle have you