The chemical reactions and pathways resulting in the formation of C21-steroid hormones, steroid compounds containing 21 carbons which function as hormones.
C21-steroid hormone catabolic process +
cytokinin biosynthetic process +
ecdysteroid biosynthetic process +
estrogen biosynthetic process +
glucocorticoid biosynthetic process +
juvenile hormone biosynthetic process +
melatonin biosynthetic process
mineralocorticoid biosynthetic process +
negative regulation of hormone biosynthetic process +
pheromone biosynthetic process
positive regulation of hormone biosynthetic process +