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Bleeding pattern and cycle control with an estradiol-based oral contraceptive: a seven-cycle, randomized comparative trial of estradiol valerate/dienogest and ethinyl estradiol/levonorgestrel

Lookup NU author(s): Dr Diana Mansour

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Abstract

Background: This study compared the bleeding pattern, cycle control and safety of an oral contraceptive (OC) comprising estradiol valerate/dienogest (E2V/DNG; administered using a dynamic dosing regimen) with a monophasic OC containing ethinyl estradiol 20 mcg/levonorgestrel 100 mcg (EE/LNG). E2V releases estradiol (E2), which is identical to endogenously produced 17 beta-estradiol. Study design: This was a randomized, multicenter, double-blind, double-dummy trial lasting seven cycles in healthy women aged 18-50 years. Results: Overall, 798 women were randomized and received allocated treatment (399 per group). There were significantly fewer bleeding/spotting days reported by women who received E2V/DNG than those who received EE/LNG [ 17.3 +/- 10.4 vs. 21.5 +/- 8.6, respectively, p<.0001, Reference Period 1 (Days 1-90); and 13.4 +/- 9. vs. 15.9 +/- 7.1, respectively, p<.0001, Reference Period 2 (Days 91-180)]. Through Cycles 1-7, the occurrence of scheduled withdrawal bleeding per cycle was 77.7-83.2% with E2V/DNG and 89.5-93.8% with EE/LNG (p<.0001 per cycle). The duration and intensity of scheduled withdrawal bleeding were reduced with E2V/DNG vs. EE/LNG. The incidence of intracyclic bleeding was similar with E2V/DNG (10.5%-18.6%) and EE/LNG (9.9%-17.1%) (p>.05 per cycle). No unintended pregnancies occurred with E2V/DNG, but there was one unintended pregnancy with EE/LNG. Adverse drug reactions occurred in 10.0% and 8.5% of women taking E2V/DNG and EE/LNG, respectively. Overall, 79.4% of women were satisfied with E2V/DNG and 79.9% with EE/LNG. Conclusions: A novel OC composed of E2V/DNG is associated with an acceptable bleeding profile that is comparable to that of an EE-containing OC. (C) 2009 Elsevier Inc. All rights reserved.

Publication metadata

Author(s): Ahrendt HJ, Makalova D, Parke S, Mellinger U, Mansour D

Publication type: Article

Publication status: Published

Journal: Contraception

Year: 2009

Volume: 80

Issue: 5

Pages: 436-444

ISSN (print): 0010-7824

ISSN (electronic):

Publisher: Elsevier

URL: http://dx.doi.org/10.1016/j.contraception.2009.03.018

DOI: 10.1016/j.contraception.2009.03.018

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