A lot of people think the hardest part of IVF is getting embryos.

Egg retrieval.
Fertilisation.
Embryo development.

So once there’s an embryo ready,
it feels like the rest should follow.

But implantation is different.

It’s the step where the embryo and the body
need to work together.

The embryo is placed into the uterus.

But what happens after that
is not something we can fully see or control.

Then why is this step so uncertain?

Because implantation depends on timing,
environment,
and how the embryo and uterus interact.

Even when everything looks ready,
this interaction doesn’t always happen as expected.

This is why a good embryo
can still not implant.

And why multiple transfers
may be needed.

Then can this step be controlled?

Some parts can be supported.

But not fully directed.

That’s why implantation often feels like a “black box”.

It’s happening,
but not something anyone can watch or adjust in real time.

And this is where many IVF journeys pause.

Right between transfer
and knowing what happens next.