Figure 2.

Used with permission from the American Physiological Society. A) Overview of the sex steroid hormone biosynthetic pathway and associated nuclear receptors. P450ssc, P450-linked side chain cleaving enzyme; CYP17, cytochrome P450 17; 3β-HSD, 3β-hydroxysteroid dehydrogenase; 17β-HSD, 17β-hydroxysteroid dehydrogenase; PR, progesterone receptor; AR, androgen receptor; ER, estrogen receptor. B) Progesterone, C) estriol, D) estradiol, E) estrone [9].

Tam et al. BMC Women's Health 2011 11:24   doi:10.1186/1472-6874-11-24
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