Transformations of Steroids and Sterols - Most steroids have hormone properties and include glucocorticoids, mineralocorticoids, androgens, estrogens, progesterones, etc. All these steroids have a basic molecular skeleton, which is cyclopentano per hydrophenanthrene or sterane nucleus, One of the steroid hormone is progesterone, which is quite active during pregnancy. On industrial scale it acts as a precursor for producing at least four other products, using micro organisms.

These conversions involve hydroxylation and dehydrogenation. The hydroxylated dehydrogenated products have better efficacy as hormone.