{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,7]],"date-time":"2026-08-07T16:15:22Z","timestamp":1786119322162,"version":"build-2736575974"},"reference-count":13,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"6","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2009,12]]},"DOI":"10.1097\/aog.0b013e3181beab47","type":"journal-article","created":{"date-parts":[[2009,11,21]],"date-time":"2009-11-21T03:20:07Z","timestamp":1258773607000},"page":"1205-1212","source":"Crossref","is-referenced-by-count":26,"title":["Cycle Control With a 21-Day Compared With a 24-Day Oral Contraceptive Pill"],"prefix":"10.1097","volume":"114","author":[{"given":"Andrew M.","family":"Kaunitz","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ronald T.","family":"Burkman","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Alan C.","family":"Fisher","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Katherine D.","family":"LaGuardia","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"276","reference":[{"key":"R1-8-20210126","doi-asserted-by":"crossref","first-page":"670","DOI":"10.1097\/AOG.0b013e31818425b7","article-title":"Hormonal contraception.","volume":"112","author":"Blumenthal","year":"2008","journal-title":"Obstet Gynecol"},{"key":"R2-8-20210126","doi-asserted-by":"crossref","first-page":"1262","DOI":"10.1056\/NEJMcp0708481","article-title":"Clinical practice. Hormonal contraception in women of older reproductive age.","volume":"358","author":"Kaunitz","year":"2008","journal-title":"N Engl J Med"},{"key":"R4-8-20210126","doi-asserted-by":"crossref","first-page":"283","DOI":"10.1016\/0010-7824(95)00074-K","article-title":"Use and misuse of oral contraceptives: risk indicators for poor pill taking and discontinuation.","volume":"51","author":"Rosenberg","year":"1995","journal-title":"Contraception"},{"key":"R5-8-20210126","doi-asserted-by":"crossref","first-page":"577","DOI":"10.1016\/S0002-9378(98)70047-X","article-title":"Oral contraceptive discontinuation. A prospective evaluation of frequency and reasons.","volume":"179","author":"Rosenberg","year":"1998","journal-title":"Am J Obstet Gynecol"},{"key":"R6-8-20210126","doi-asserted-by":"crossref","first-page":"220","DOI":"10.1016\/j.contraception.2006.03.022","article-title":"Comparison profiles of cycle control, side effects and sexual satisfaction of three hormonal contraceptives.","volume":"74","author":"Sabatini","year":"2006","journal-title":"Contraception"},{"key":"R7-8-20210126","doi-asserted-by":"crossref","first-page":"16","DOI":"10.1016\/j.contraception.2006.08.004","article-title":"Efficacy and safety of a new 24-day oral contraceptive regimen of norethindrone acetate 1 mg\/ethinyl estradiol 20 \u03bcg (Loestrin 24 Fe).","volume":"75","author":"Nakajima","year":"2007","journal-title":"Contraception"},{"key":"R8-8-20210126","doi-asserted-by":"crossref","first-page":"289","DOI":"10.1016\/S0010-7824(01)00214-1","article-title":"Comparison of a novel norgestimate\/ethinyl estradiol contraceptive (Ortho Tri-Cyclen Lo) with the oral contraceptive Loestrin Fe 1\/20.","volume":"63","author":"Hampton","year":"2001","journal-title":"Contraception"},{"key":"R9-8-20210126","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 20 \u03bcg ethinylestradiol and 3 mg drospirenone.","volume":"70","author":"Bachmann","year":"2004","journal-title":"Contraception"},{"key":"R10-8-20210126","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 20 \u03bcg combined with either drospirenone or desogestrel on lipids, hemostatic parameters and carbohydrate metabolism.","volume":"71","author":"Klipping","year":"2005","journal-title":"Contraception"},{"key":"R11-8-20210126","doi-asserted-by":"crossref","first-page":"4","DOI":"10.1016\/j.contraception.2006.08.008","article-title":"Combined hormonal contraceptive trials: variable data collection and bleeding assessment methodologies influence study outcomes and physician perceptions.","volume":"75","author":"Mishell","year":"2007","journal-title":"Contraception"},{"key":"R12-8-20210126","doi-asserted-by":"crossref","first-page":"11","DOI":"10.1016\/j.contraception.2006.08.012","article-title":"Recommendations for standardization of data collection and analysis of bleeding in combined hormone contraceptive trials.","volume":"75","author":"Mishell","year":"2007","journal-title":"Contraception"},{"key":"R16-8-20210126","doi-asserted-by":"crossref","first-page":"253","DOI":"10.1016\/0010-7824(86)90006-5","article-title":"The analysis of vaginal bleeding patterns induced by fertility regulating methods.","volume":"34","author":"Belsey","year":"1986","journal-title":"Contraception"},{"key":"R18-8-20210126","doi-asserted-by":"crossref","first-page":"434","DOI":"10.1016\/j.fertnstert.2008.07.010","article-title":"Scheduled and unscheduled bleeding patterns with two combined hormonal contraceptives: application of new recommendations for standardization.","volume":"92","author":"Hampton","year":"2009","journal-title":"Fertil Steril"}],"container-title":["Obstetrics & Gynecology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.ovid.com\/10.1097\/AOG.0b013e3181beab47","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,8,6]],"date-time":"2026-08-06T18:02:53Z","timestamp":1786039373000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.ovid.com\/00006250-200912000-00008"}},"subtitle":["A Randomized Controlled Trial"],"short-title":[],"issued":{"date-parts":[[2009,12]]},"references-count":13,"journal-issue":{"issue":"6","published-print":{"date-parts":[[2009]]}},"URL":"https:\/\/doi.org\/10.1097\/aog.0b013e3181beab47","relation":{},"ISSN":["0029-7844"],"issn-type":[{"value":"0029-7844","type":"print"}],"subject":[],"published":{"date-parts":[[2009,12]]}}}