Comparative serum steroid (CSS) levels of norelgestromin (NGMN) and ethinyl estradiol (EE) following patch administration. (Reproduced with permission from Abrams LS et al. Multiple-dose pharmacokinetics of a contraceptive patch in healthy women participants. Contraception. 2001 Nov;64(5):287-294.) Source: Female Reproductive Endocrinology and Infertility, Greenspan's Basic & Clinical Endocrinology, 10e Citation: Gardner DG, Shoback D. Greenspan's Basic & Clinical Endocrinology, 10e; 2017 Available at: http://accessmedicine.mhmedical.com/DownloadImage.aspx?image=/data/books/2178/gardgreen10_ch13_f024-1.png&sec=166251085&BookID=2178&ChapterSecID=166250715&imagename= Accessed: October 30, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved