Every fertility center in the United States is required by law to report their IVF Success Rates to The Centers for Disease Control and Prevention (CDC).  The CDC takes three years to collect the data for each year’s cycles.  This is because the outcome of pregnancies is not immediately known.  Additionally, analyzing data and preparing it in a uniform reporting style takes time.  While the CDC report contains the current national data, SART provides reports within two years for their member clinics. Who is SART? The Society for Assisted Reproductive Technology (SART) reports on success rates for most fertility clinics in the