regulates regulation of macromolecule biosynthetic process hemoglobin biosynthetic process regulation of hemoglobin biosynthetic process biological_process GO:0046984 regulation of hemoglobin synthesis regulation of hemoglobin formation regulation of haemoglobin biosynthetic process regulation of hemoglobin biosynthesis regulation of hemoglobin anabolism Any process that modulates the frequency, rate or extent of the chemical reactions and pathways resulting in the formation of hemoglobin, an oxygen carrying, conjugated protein containing four heme groups and globin. regulation of haemoglobin biosynthesis regulation of protein metabolic process biological regulation