ICSI or Intracytoplasmic sperm injection, is a part of the IVF procedure itself.
Once eggs are extracted during IVF, there are two ways to fertilise the eggs with the sperm in the IVF Lab.
The first is conventional IVF, where eggs are placed in the petridish with good concentration of motile sperms and incubated overnight and checked for fertilisation after 16-18 hours.
The alternative is ICSI, especially indicated in cases of severe male infertility/history of previous poor fertilisation with IVF/routinely in some centers, where each egg is injected with a single sperm under the microscope with specialised micromanipulators and checked for fertilisation after 16-18 hours.
The rest of the procedure of IVF remains the same in both the cases.
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