The expansion of a hematopoietic stem cell population by cell division. A hematopoietic stem cell is a stem cell from which all cells of the lymphoid and myeloid lineages develop. [ GOC:rl GOC:add GOC:BHF GOC:mah http://purl.obolibrary.org/obo/CL_0000037 ]
Synonyms: hemopoietic stem cell proliferation