Fertilization rates of 70 to 80 percent of all eggs injected – equivalent to fertilization with normal sperm – are currently being achieved, and pregnancy rates are comparable to those seen with IVF in couples with no male factor infertility.
The most important indicator of ICSI success appears to be the fertilization rate achieved with the ICSI procedure. The fertilization rates currently achieved are 80 to 85 percent. That is to say, on average, eight out of every 10 eggs will fertilize normally.