Utilization and success rates of unstimulated in vitro fertilization in the United States: an analysis of the Society for Assisted Reproductive Technology database

Objective To examine the utilization and outcomes of natural cycle (unstimulated) IVF as reported to the Society of Assisted Reproductive Technology (SART) in 2006 and 2007. Design Retrospective analysis. Setting Dataset analysis from the SART Clinical Outcome Reporting System national database. Patient(s) All patients undergoing IVF as reported to SART in 2006 and 2007. Intervention(s) None. Main Outcome Measure(s) Utilization of unstimulated IVF; description of patient demographics; and comparison of implantation and pregnancy rates between unstimulated and stimulated IVF cycles. Result(s) During 2006 and 2007 a total of 795 unstimulated IVF cycles were initiated. Success rates were age dependent, with patients Conclusion(s) Unstimulated IVF represents