Giving that adequate CD34+ cell doses in CB transplantation for hematologic malignancies has been evaluated at ≥1,5 x105/kg (2), using such maternally enriched CD34+ cell CB as the one described here, would mean that a 70kg adult recipient would receive a non-negligible amount of 3,000 maternal CD34+ cells. The gene discussed is CD34; the disease is hematologic disorder.