ICSI is a process where the embryologist picks up a single sperm using a highly specialized microscope and specially developed fine glass needles. The embryologist then injects the sperm directly into the center of an egg. This process is repeated for each of the mature eggs that have been collected.
When is I.C.S.I preferred
ICSI is usually used for couples with a very poor sperm count or motility
It is also used if there has been poor fertilization in previous IVF cycle.
ICSI is also used when there is reason to believe that ICSI will be the only way to achieve fertilization.
ICSI is also used in patients with obstructive Azoospermia. This is a condition where sperms are obtained by testicular biopsy or epididymal aspiration directly from the testies.