Intracytoplasmic Sperm Injection (ICSI)
A precise step within IVF, mainly for male-factor cases.
Dr. Vijaya ReddyMedically reviewed · 1 June 2026In short
What is Intracytoplasmic Sperm Injection?
ICSI is a technique used within IVF where a single sperm is injected directly into an egg. It's especially useful for significant male-factor infertility or after previous fertilisation problems — and is recommended based on specific indications, not added by default.
When it can help
- Significant male-factor infertility (low count or motility)
- Previous failed or low fertilisation with standard IVF
- Use of surgically retrieved sperm (e.g. after Micro-TESE)
How ICSI fits into IVF
ICSI is part of the lab fertilisation stage of IVF. Instead of letting sperm fertilise the egg on its own, an embryologist injects one selected sperm directly into each mature egg.
Questions people ask
Do I need ICSI with IVF?
Not always. ICSI is added for specific reasons — mainly male-factor issues or previous fertilisation problems. For many couples, standard IVF fertilisation is appropriate. An embryologist and clinician decide based on your sperm and history, not as a routine add-on.
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