Our outcome measures show the difference among physicians, scientists, laboratory technicians, and expertise available across IVF clinics. When we review fertility clinics that use our frozen eggs, the mean pregnancy rate is around 77 percent from the first transfer of embryos created with the first set of eggs. Considering all that goes into an IVF cycle and the factors outside our control once the eggs are sent out of our laboratory, we think this truly reflects the likelihood of success with our frozen eggs.