Dr. Geoffrey Sher just published an insightful blog post outlining some of the deficiencies in the current SART/CDC IVF success rate model. Specifically he mentions:

• Currently all data collected is self reported by the member clinics and is not audited by a third party.
• Spot checks are performed on only approximately 10% of member clinics
• These spot checks verify the number of live births but do not verify the total number of cycles performed by the clinic. This means that the success rate reported by the clinic still remains unverified.