{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,8]],"date-time":"2026-07-08T22:49:55Z","timestamp":1783550995571,"version":"3.55.0"},"reference-count":20,"publisher":"Elsevier BV","issue":"2","license":[{"start":{"date-parts":[[2011,4,1]],"date-time":"2011-04-01T00:00:00Z","timestamp":1301616000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/tdm\/userlicense\/1.0\/"},{"start":{"date-parts":[[2011,4,1]],"date-time":"2011-04-01T00:00:00Z","timestamp":1301616000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/legal\/tdmrep-license"}],"funder":[{"name":"Bayer Schering Pharma"}],"content-domain":{"domain":["clinicalkey.com","clinicalkey.com.au","clinicalkey.es","clinicalkey.fr","clinicalkey.jp","ejog.org","elsevier.com","sciencedirect.com"],"crossmark-restriction":true},"short-container-title":["European Journal of Obstetrics &amp; Gynecology and Reproductive Biology"],"published-print":{"date-parts":[[2011,4]]},"DOI":"10.1016\/j.ejogrb.2010.12.037","type":"journal-article","created":{"date-parts":[[2011,2,2]],"date-time":"2011-02-02T04:45:14Z","timestamp":1296621914000},"page":"180-182","update-policy":"https:\/\/doi.org\/10.1016\/elsevier_cm_policy","source":"Crossref","is-referenced-by-count":10,"title":["Contraceptive efficacy of a combined oral contraceptive containing ethinyloestradiol 20 \u03bcg\/drospirenone 3 mg administered in a 24\/4 regimen: a pooled analysis of four open-label studies"],"prefix":"10.1016","volume":"155","author":[{"given":"Leena","family":"Anttila","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gloria","family":"Bachmann","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"L\u00e1szl\u00f3","family":"Hern\u00e1di","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael","family":"Kunz","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Joachim","family":"Marr","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christine","family":"Klipping","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"78","reference":[{"issue":"3","key":"10.1016\/j.ejogrb.2010.12.037_bib0005","doi-asserted-by":"crossref","first-page":"191","DOI":"10.1016\/j.contraception.2004.05.013","article-title":"Efficacy and safety of a low-dose 24-day combined oral contraceptive containing 20micrograms ethinylestradiol and 3mg drospirenone","volume":"70","author":"Bachmann","year":"2004","journal-title":"Contraception"},{"issue":"1","key":"10.1016\/j.ejogrb.2010.12.037_bib0010","doi-asserted-by":"crossref","first-page":"18","DOI":"10.1016\/j.contraception.2009.01.016","article-title":"Efficacy and safety of a low-dose combined oral contraceptive containing drospirenone 3mg and ethinylestradiol 20mcg in a 24\/4-day regimen","volume":"80","author":"Hern\u00e1di","year":"2009","journal-title":"Contraception"},{"issue":"5","key":"10.1016\/j.ejogrb.2010.12.037_bib0015","doi-asserted-by":"crossref","first-page":"445","DOI":"10.1016\/j.contraception.2009.03.013","article-title":"Bleeding pattern with drospirenone 3mg+ethinyl estradiol 20mcg 24\/4 combined oral contraceptive compared with desogestrel 150mcg+ethinyl estradiol 20mcg 21\/7 combined oral contraceptive","volume":"80","author":"Anttila","year":"2009","journal-title":"Contraception"},{"issue":"2","key":"10.1016\/j.ejogrb.2010.12.037_bib0020","doi-asserted-by":"crossref","first-page":"115","DOI":"10.2165\/00024677-200605020-00005","article-title":"A comparison of the cycle control, safety, and efficacy profile of a 21-day regimen of ethinylestradiol 20mug and drospirenone 3mg with a 21-day regimen of ethinylestradiol 20mug and desogestrel 150mug","volume":"5","author":"Gruber","year":"2006","journal-title":"Treat Endocrinol"},{"issue":"6","key":"10.1016\/j.ejogrb.2010.12.037_bib0025","doi-asserted-by":"crossref","first-page":"409","DOI":"10.1016\/j.contraception.2004.12.005","article-title":"Effects of two combined oral contraceptives containing ethinyl estradiol 20microg combined with either drospirenone or desogestrel on lipids, hemostatic parameters and carbohydrate metabolism","volume":"71","author":"Klipping","year":"2005","journal-title":"Contraception"},{"issue":"3","key":"10.1016\/j.ejogrb.2010.12.037_bib0030","doi-asserted-by":"crossref","first-page":"492","DOI":"10.1097\/01.AOG.0000175834.77215.2e","article-title":"Efficacy of a new low-dose oral contraceptive with drospirenone in premenstrual dysphoric disorder","volume":"106","author":"Yonkers","year":"2005","journal-title":"Obstet Gynecol"},{"issue":"6","key":"10.1016\/j.ejogrb.2010.12.037_bib0035","doi-asserted-by":"crossref","first-page":"414","DOI":"10.1016\/j.contraception.2005.08.021","article-title":"Treatment of premenstrual dysphoric disorder with a new drospirenone-containing oral contraceptive formulation","volume":"72","author":"Pearlstein","year":"2005","journal-title":"Contraception"},{"issue":"4 Suppl.","key":"10.1016\/j.ejogrb.2010.12.037_bib0040","first-page":"102S","article-title":"Drospirenone 3mg\/ethinylestradiol 20 mcg in the treatment of Acne vulgaris: patient self-assessment","volume":"109","author":"Maloney","year":"2007","journal-title":"Obstet Gynecol"},{"issue":"4 Suppl.","key":"10.1016\/j.ejogrb.2010.12.037_bib0045","first-page":"11S","article-title":"Drospirenone 3mg\/ethinylestradiol 20mcg combined oral contraceptive in the treatment of acne vulgaris: lesion count, ISGA","volume":"109","author":"Maloney","year":"2007","journal-title":"Obstet Gynecol"},{"issue":"2","key":"10.1016\/j.ejogrb.2010.12.037_bib0050","doi-asserted-by":"crossref","first-page":"87","DOI":"10.1080\/ejc.8.2.87.92","article-title":"Recommendation for confidence interval and sample size calculation for the Pearl Index","volume":"8","author":"Gerlinger","year":"2003","journal-title":"Eur J Contracept Reprod Health Care"},{"issue":"1","key":"10.1016\/j.ejogrb.2010.12.037_bib0055","doi-asserted-by":"crossref","first-page":"118","DOI":"10.1016\/S0149-2918(00)88272-7","article-title":"International clinical experience with a new low-dose, monophasic oral contraceptive containing levonorgestrel 100microg and ethinyl estradiol 20microg","volume":"21","author":"Boerrigter","year":"1999","journal-title":"Clin Ther"},{"issue":"1","key":"10.1016\/j.ejogrb.2010.12.037_bib0060","doi-asserted-by":"crossref","first-page":"7","DOI":"10.3109\/13625189909043474","article-title":"Large observational trial of a new low-dose oral contraceptive containing 20micrograms ethinylestradiol and 100micrograms levonorgestrel (Miranova) in Germany","volume":"4","author":"Hite","year":"1999","journal-title":"Eur J Contracept Reprod Health Care"},{"issue":"1","key":"10.1016\/j.ejogrb.2010.12.037_bib0065","doi-asserted-by":"crossref","first-page":"33","DOI":"10.3109\/09513599609041268","article-title":"A three-year clinical investigation into efficacy, cycle control and tolerability of a new low-dose monophasic oral contraceptive containing gestodene","volume":"10","author":"Dusterberg","year":"1996","journal-title":"Gynecol Endocrinol"},{"issue":"5 Pt 2","key":"10.1016\/j.ejogrb.2010.12.037_bib0070","doi-asserted-by":"crossref","first-page":"39","DOI":"10.1016\/S0002-9378(99)70362-5","article-title":"Efficacy and safety of a low-dose monophasic combination oral contraceptive containing 100microg levonorgestrel and 20microg ethinyl estradiol (Alesse). North American Levonorgestrel Study Group (NALSG)","volume":"181","author":"Archer","year":"1999","journal-title":"Am J Obstet Gynecol"},{"issue":"1","key":"10.1016\/j.ejogrb.2010.12.037_bib0075","doi-asserted-by":"crossref","first-page":"S2","DOI":"10.1016\/S0002-9378(98)70290-X","article-title":"An open-label, multicenter, noncomparative safety and efficacy study of Mircette, a low-dose estrogen\u2013progestin oral contraceptive. The Mircette Study Group","volume":"179","year":"1998","journal-title":"Am J Obstet Gynecol"},{"issue":"2","key":"10.1016\/j.ejogrb.2010.12.037_bib0080","doi-asserted-by":"crossref","first-page":"71","DOI":"10.1016\/0010-7824(96)00137-0","article-title":"Shorter pill-free interval in combined oral contraceptives decreases follicular development","volume":"54","author":"Spona","year":"1996","journal-title":"Contraception"},{"issue":"2","key":"10.1016\/j.ejogrb.2010.12.037_bib0085","doi-asserted-by":"crossref","first-page":"100","DOI":"10.1016\/j.contraception.2006.02.006","article-title":"Greater inhibition of the pituitary\u2013ovarian axis in oral contraceptive regimens with a shortened hormone-free interval","volume":"74","author":"Willis","year":"2006","journal-title":"Contraception"},{"issue":"1","key":"10.1016\/j.ejogrb.2010.12.037_bib0090","doi-asserted-by":"crossref","first-page":"115","DOI":"10.1016\/S0015-0282(99)00205-8","article-title":"Effect of 21-day and 24-day oral contraceptive regimens containing gestodene (60microg) and ethinyl estradiol (15microg) on ovarian activity","volume":"72","author":"Sullivan","year":"1999","journal-title":"Fertil Steril"},{"issue":"1","key":"10.1016\/j.ejogrb.2010.12.037_bib0095","doi-asserted-by":"crossref","first-page":"16","DOI":"10.1016\/j.contraception.2008.02.019","article-title":"Suppression of ovarian activity with a drospirenone-containing oral contraceptive in a 24\/4 regimen","volume":"78","author":"Klipping","year":"2008","journal-title":"Contraception"},{"key":"10.1016\/j.ejogrb.2010.12.037_bib0100","series-title":"Abstract Plus Oral Presentation at the 57th Annual Clinical Meeting of the American College of Obstetricians & Gynecologists","article-title":"Contraceptive effectiveness of oral contraceptives: the impact of a 24-day regimen","author":"Dinger","year":"2009"}],"container-title":["European Journal of Obstetrics &amp; Gynecology and Reproductive Biology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0301211511000182?httpAccept=text\/xml","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0301211511000182?httpAccept=text\/plain","content-type":"text\/plain","content-version":"vor","intended-application":"text-mining"}],"deposited":{"date-parts":[[2025,10,4]],"date-time":"2025-10-04T05:23:32Z","timestamp":1759555412000},"score":1,"resource":{"primary":{"URL":"https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/S0301211511000182"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2011,4]]},"references-count":20,"journal-issue":{"issue":"2","published-print":{"date-parts":[[2011,4]]}},"alternative-id":["S0301211511000182"],"URL":"https:\/\/doi.org\/10.1016\/j.ejogrb.2010.12.037","relation":{},"ISSN":["0301-2115"],"issn-type":[{"value":"0301-2115","type":"print"}],"subject":[],"published":{"date-parts":[[2011,4]]},"assertion":[{"value":"Elsevier","name":"publisher","label":"This article is maintained by"},{"value":"Contraceptive efficacy of a combined oral contraceptive containing ethinyloestradiol 20\u03bcg\/drospirenone 3mg administered in a 24\/4 regimen: a pooled analysis of four open-label studies","name":"articletitle","label":"Article Title"},{"value":"European Journal of Obstetrics & Gynecology and Reproductive Biology","name":"journaltitle","label":"Journal Title"},{"value":"https:\/\/doi.org\/10.1016\/j.ejogrb.2010.12.037","name":"articlelink","label":"CrossRef DOI link to publisher maintained version"},{"value":"article","name":"content_type","label":"Content Type"},{"value":"Copyright \u00a9 2011 Elsevier Ireland Ltd. All rights reserved.","name":"copyright","label":"Copyright"}]}}