Oral contraceptive pill hormonal components Oral contraceptive pill hormonal components. All except endogenous hormones are synthetic steroids. Source: Chapter 13. Female Reproductive Endocrinology and Infertility, Greenspan’s Basic & Clinical Endocrinology, 9e Citation: Gardner DG, Shoback D. Greenspan’s Basic & Clinical Endocrinology, 9e; 2011 Available at: https://accessmedicine.mhmedical.com/DownloadImage.aspx?image=/data/Books/gard9/gard9_c013f017b.gif&sec=39748311&BookID=380&ChapterSecID=39744053&imagename= Accessed: October 23, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved