. "Any process that modulates the frequency, rate or extent of the chemical reactions and pathways resulting in the formation of interleukin-12." . . . "regulation of interleukin-12 biosynthetic process" . "regulation of IL-12 biosynthesis" . "regulation of IL-12 biosynthetic process" . "regulation of interleukin-12 anabolism" . "regulation of interleukin-12 biosynthesis" . "regulation of interleukin-12 formation" . "regulation of interleukin-12 synthesis" . . . . .