Figure 2:Bioconversion of DHEA and androstenedione to sex steroids Steroidogenic enzymes (Gene names): HSD3B, 3 b -hydroyxsteroid dehydrogenase isozymes; HSD17B, 17 b -hydroxysteroid dehydrogenase isozymes, SRD5A, 5 b -reductases isozymes, AKR1C, 3 b -hydroxysteroid dehydrogenase isozymes; CYP19, P450 aromatase.