What is ICSI?
There is no "standard of care" in this field of medicine regarding which cases should have the ICSI procedure and which should not.
Some clinics use it only for severe male factor infertility, and some use it on every case. The large majority of IVF clinics are somewhere in the middle of these 2 extremes.
Our thinking about ICSI has changed over time, and we are now doing more ICSI (as a percentage of total cases) than we were 10-12 years ago. As we learn more about methods to help couples conceive, our thinking will continue to evolve.
The ICSI process differs from IVF only in the Laboratory. All the steps for the patient from the time of using hormonal injections to stimulate the production of multiple eggs till the embryo transfer remain the same for the patient. However in the Lab, the oocytes are subjected to ICSI instead of just leaving the sperms surrounding the egg and waiting for fertilization as happens in IVF.