A lot of people hear about ICSI and feel reassured.

A single sperm is injected directly into the egg.

So it sounds like:

“Okay, this should solve fertilisation.”

And ICSI does help.

It bypasses the need for the sperm to reach and enter the egg on its own.

That part is controlled.

But fertilisation is not just about entry.

After the sperm is injected,
the egg still needs to activate.

It needs to start the process of becoming an embryo.

And that step doesn’t always happen.

Even when the injection is done properly.

So ICSI improves the chance of fertilisation.

But it doesn’t make it guaranteed.

Then why do people use it?

Because it helps in situations
where natural fertilisation is less likely.

Especially when there are sperm-related challenges.

But even with that support,
the process still depends on how the egg responds.

So ICSI is not a guarantee.

It’s a way to improve one part of the process
that still depends on what happens next.