Objective: To summarize the procedures and outcomes of assisted reproductive technologies (ART) that were initiated in the United States in 2001. Design: Data were collected electronically using the Society for Assisted Reproductive Technology (SART) Clinic Outcome Reporting System software and submitted to the American Society for Reproductive Medicine/SART Registry. Participant(s): Three hundred eighty-five clinics submitted data on procedures performed in 2001. Data were collated after November 2001 so that the outcomes of all pregnancies would be known. Main Outcome Measure(s): Incidence of clinical pregnancy, ectopic pregnancy, abortion, stillbirth, and delivery. Result(s): Programs reported initiating 108,130 cycles of ART treatment. Of these, 79,042 cycles involved IVF (with and without micromanipulation), with a delivery rate per retrieval of 31.6%; 340 were cycles of gamete intrafallopian transfer, with a delivery rate per retrieval of 21.9%; 661 were cycles of zygote intrafallopian transfer, with a delivery rate per retrieval of 31.0%. The following additional ART procedures were also initiated: 8,147 fresh donor oocyte cycles, with a delivery rate per transfer of 47.3%; 14,509 frozen ET procedures, with a delivery rate per transfer of 23.5%; 3,187 frozen ETs employing donated oocytes or embryos, with a delivery rate per transfer of 27.4%; and 1,366 cycles using a host uterus, with a delivery rate per transfer of 38.7%. In addition, 112 cycles were reported as combinations of more than one treatment type, 8 cycles as research, and 85 as embryo banking. As a result of all procedures, 29,585 deliveries were reported, resulting in 41,168 neonates. Conclusion(S): In 2001, there were more programs reporting ART treatment and a significant increase in reported cycles compared with 2000.
