Waiting for Engraftment

In a bone marrow transplant, there comes a moment that demands extraordinary trust. The patient's own marrow has been destroyed by chemotherapy. The donor cells have been infused through an IV — they look like nothing more than a small bag of blood. And then begins the waiting.

For two to four weeks, those transplanted stem cells travel through the bloodstream, searching for the hollow cavities of bone where they will take up residence and begin producing new life. Doctors call this process engraftment. During those long days, the patient sits in a sterile room with virtually no immune system, watching nurses check blood counts every morning, looking for the first flicker of rising neutrophils — the earliest sign that something unseen has taken root.

The patient cannot feel engraftment happening. There is no sensation when a stem cell nestles into the marrow and begins to divide. There is only the waiting, the vulnerability, and the trust that what was given is doing its hidden work.

Faith operates in that same space. Scripture tells us faith is "the substance of things hoped for, the evidence of things not seen." We receive the grace of God, and then we live in the waiting — unable to measure the transformation, unable to rush it, asked only to trust that the life planted within us is taking hold.

The good news is what every transplant physician knows: engraftment almost always comes. Not on our schedule, but it comes. The new life takes root. The counts begin to rise.