ICSI is a micromanipulation technique that was developed to overcome male infertility. It is a variation of IVF and is applied when the estimated fertilization rates would be very low or nil using conventional IVF.
For the patient, the phases and the procedures are the same as in conventional IVF as for ICSI. The only difference is in the lab work the biologist performs. In conventional IVF, the sperm fertilizes the egg on its own and in ICSI, the biologist selects the most adequate sperm and then injects it into the egg.