Treatment choices

What is ICSI and when may it be used in IVF?

Intracytoplasmic sperm injection (ICSI) is a way of fertilising an egg in the laboratory during IVF. An embryologist injects a selected sperm into an egg. It addresses a specific step of fertilisation, but does not guarantee that an embryo will develop or that a pregnancy will result.

Why might it be discussed?

Sperm findings, prior fertilisation results or the way sperm is obtained may lead a team to consider ICSI. The reason should be clear in your individual plan. It is not automatically required in every IVF cycle, and using a more complex laboratory technique does not always improve the outcome for someone without an indication.

What still has to happen?

Eggs must be collected and assessed for maturity. After injection, the laboratory checks whether fertilisation occurs and follows embryo development. Not every injected egg will fertilise, and not every fertilised egg will be suitable for transfer or freezing. The team's report can help distinguish the number of eggs collected from the number of embryos available.

Questions to bring to the clinic

Ask why ICSI is being recommended, whether conventional IVF is an alternative and what additional costs or laboratory steps are involved. Discuss the benefits, limitations and any risks in the context of your own medical history. If you have a prior unsuccessful cycle, ask what was learned from it before changing the plan.

Is ICSI a separate treatment from IVF?

It is a fertilisation method used within an IVF cycle, not a replacement for the other IVF stages.

For general education only. This page is not a diagnosis or an individual treatment plan. Discuss decisions with a qualified clinician. For urgent symptoms, seek urgent medical care.