In chickens , estrogens stimulate outgrowth of bone marrow-derived erythroid progenitor cells and delay their maturation .
in chickens , estrogens stimulate outgrowth of bone marrow-derived erythroid progenitor cells and delay their maturation .
O O O O O O O B-cell_type I-cell_type I-cell_type I-cell_type I-cell_type O O O B-other_name O