 PBSCs are collected from the donor's blood after five or six days of taking a drug that causes hematopoietic cells in the bone marrow to move into the circulating blood.In both cases, recovery is usually swift and donors typically have fully restored marrow and blood cell counts in under two weeks.Cord blood cells are obtained from the umbilical cord and placenta of a newborn baby after the cord is clamped and cut as in a normal delivery.