myelopoiesis

noun

my·​e·​lo·​poi·​e·​sis ˌmī-ə-lō-(ˌ)pȯi-ˈē-səs 

plural myelopoieses -ˈē-ˌsēz 

1

: production of bone marrow or bone marrow cells

2

: production of blood cells in bone marrow

especially : formation of blood granulocytes