{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,13]],"date-time":"2026-04-13T12:40:12Z","timestamp":1776084012812,"version":"3.50.1"},"reference-count":19,"publisher":"Elsevier BV","issue":"1","license":[{"start":{"date-parts":[[2005,7,1]],"date-time":"2005-07-01T00:00:00Z","timestamp":1120176000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/tdm\/userlicense\/1.0\/"},{"start":{"date-parts":[[2005,7,1]],"date-time":"2005-07-01T00:00:00Z","timestamp":1120176000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.elsevier.com\/legal\/tdmrep-license"}],"content-domain":{"domain":["ajog.org","clinicalkey.com","clinicalkey.com.au","clinicalkey.es","clinicalkey.fr","clinicalkey.jp","elsevier.com","sciencedirect.com"],"crossmark-restriction":true},"short-container-title":["American Journal of Obstetrics and Gynecology"],"published-print":{"date-parts":[[2005,7]]},"DOI":"10.1016\/j.ajog.2004.11.006","type":"journal-article","created":{"date-parts":[[2005,7,15]],"date-time":"2005-07-15T09:34:03Z","timestamp":1121420043000},"page":"71-75","update-policy":"https:\/\/doi.org\/10.1016\/elsevier_cm_policy","source":"Crossref","is-referenced-by-count":32,"title":["Cervicovaginal fluid changes to detect ovulation accurately"],"prefix":"10.1016","volume":"193","author":[{"given":"Mar\u00eda Elena","family":"Alliende","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Carlos","family":"Cabez\u00f3n","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Horacio","family":"Figueroa","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Cristi\u00e1n","family":"Kottmann","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"78","reference":[{"key":"10.1016\/j.ajog.2004.11.006_bib1","doi-asserted-by":"crossref","first-page":"90","DOI":"10.1016\/S0015-0282(02)03167-9","article-title":"Mean versus individual hormonal profiles in the menstrual cycle","volume":"78","author":"Alliende","year":"2002","journal-title":"Fertil Steril"},{"key":"10.1016\/j.ajog.2004.11.006_bib2","doi-asserted-by":"crossref","first-page":"255","DOI":"10.1002\/sim.4780100209","article-title":"Using the ratio of urinary oestrogen and progesterone metabolites to estimate day of ovulation","volume":"10","author":"Baird","year":"1991","journal-title":"Stat Med"},{"key":"10.1016\/j.ajog.2004.11.006_bib3","first-page":"822","article-title":"Chronological aspects of ultrasonic, hormonal, and other indirect indices of ovulation","volume":"108","author":"Ecochard","year":"2001","journal-title":"BJOG"},{"key":"10.1016\/j.ajog.2004.11.006_bib4","doi-asserted-by":"crossref","first-page":"465","DOI":"10.1016\/S0039-128X(03)00049-7","article-title":"Hormonal monitoring of ovarian activity using the ovarian monitor: part I, validation of home and laboratory results obtained during ovulatory cycles by comparison with radioimmunoassay","volume":"68","author":"Blackwell","year":"2003","journal-title":"Steroids"},{"key":"10.1016\/j.ajog.2004.11.006_bib5","doi-asserted-by":"crossref","first-page":"1826","DOI":"10.1093\/humrep\/12.8.1826","article-title":"Volumetric self-sampling of cervicovaginal fluid to determine potential fertility: a multicentre pre-effectiveness study of the Rovumeter","volume":"12","author":"Flynn","year":"1997","journal-title":"Hum Reprod"},{"key":"10.1016\/j.ajog.2004.11.006_bib6","first-page":"187","article-title":"Methodology of teaching natural methods of birth regulation (special reference to the Billings ovulation method)","volume":"49","author":"Mena","year":"1984","journal-title":"Rev Chil Obstet Ginecol"},{"key":"10.1016\/j.ajog.2004.11.006_bib7","first-page":"45","article-title":"Clinical indicators of the fertile period","volume":"1","author":"Gross","year":"1989","journal-title":"Suppl Int J Gynaecol Obstet"},{"key":"10.1016\/j.ajog.2004.11.006_bib8","doi-asserted-by":"crossref","first-page":"59","DOI":"10.1016\/S0301-2115(99)00249-3","article-title":"Sensitivity and specificity of ultrasound indices of ovulation in spontaneous cycles","volume":"91","author":"Ecochard","year":"2000","journal-title":"Eur J Obstet Gynecol Reprod Biol"},{"key":"10.1016\/j.ajog.2004.11.006_bib9","first-page":"257","article-title":"Ultrasonographic characterization of the endometrium through the spontaneous ovulatory menstrual cycle","volume":"57","author":"Gormaz","year":"1992","journal-title":"Rev Chil Obstet Ginecol"},{"key":"10.1016\/j.ajog.2004.11.006_bib10","first-page":"147","article-title":"Correlazione tra indicatori del periodo fertile del ciclo menstruale ed ovulazione ecograficamente determinata","volume":"14","author":"Croce","year":"1989","journal-title":"Minerva Endocrinol"},{"issue":"suppl","key":"10.1016\/j.ajog.2004.11.006_bib11","first-page":"17","article-title":"Detection of the fertile phase from changes in cervico-vaginal fluid volume","volume":"33","author":"Flynn","year":"1988","journal-title":"Int J Fertil"},{"key":"10.1016\/j.ajog.2004.11.006_bib12","doi-asserted-by":"crossref","first-page":"647","DOI":"10.1016\/S0015-0282(16)47060-3","article-title":"Temporal relationship between indices of the fertile period","volume":"39","author":"WHO task force","year":"1983","journal-title":"Fertil Steril"},{"key":"10.1016\/j.ajog.2004.11.006_bib13","doi-asserted-by":"crossref","first-page":"900","DOI":"10.1016\/S0015-0282(99)00365-9","article-title":"Efficacy of methods for determining ovulation in a natural family planning program","volume":"72","author":"Guida","year":"1999","journal-title":"Fertil Steril"},{"key":"10.1016\/j.ajog.2004.11.006_bib14","first-page":"575","article-title":"Natural family planning 1: the peak symptom and estimated time of ovulation","volume":"52","author":"Hilgers","year":"1978","journal-title":"Obstet Gynecol"},{"key":"10.1016\/j.ajog.2004.11.006_bib15","doi-asserted-by":"crossref","first-page":"333","DOI":"10.1097\/00006250-198003000-00013","article-title":"Natural family planning: II, basal body temperature an estimated time of ovulation","volume":"55","author":"Hilgers","year":"1980","journal-title":"Obstet Gynecol"},{"key":"10.1016\/j.ajog.2004.11.006_bib16","doi-asserted-by":"crossref","first-page":"208","DOI":"10.1093\/oxfordjournals.humrep.a138023","article-title":"validation of the dual analyte assay of the oestrone:pregnandiol ratio in monitoring ovarian function","volume":"8","author":"Fabres","year":"1993","journal-title":"Hum Reprod"},{"key":"10.1016\/j.ajog.2004.11.006_bib17","first-page":"18","article-title":"A prospective multicentre study to develop universal immunochemical tests for predicting the fertile period in women","volume":"30","author":"WHO task force on methods for the determination of the fertile period, special programme of research development and research training in human reproduction","year":"1985","journal-title":"Int J Fertil"},{"key":"10.1016\/j.ajog.2004.11.006_bib18","doi-asserted-by":"crossref","first-page":"965","DOI":"10.1002\/sim.716","article-title":"Assessing human fertility using several markers of ovulation","volume":"20","author":"Dunson","year":"2001","journal-title":"Stat Med"},{"key":"10.1016\/j.ajog.2004.11.006_bib19","doi-asserted-by":"crossref","first-page":"1835","DOI":"10.1093\/humrep\/14.7.1835","article-title":"Day-specific probabilities of clinical pregnancy based on two studies with imperfect measures of ovulation","volume":"14","author":"Dunson","year":"1999","journal-title":"Hum Rep"}],"container-title":["American Journal of Obstetrics and Gynecology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0002937804018770?httpAccept=text\/xml","content-type":"text\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/api.elsevier.com\/content\/article\/PII:S0002937804018770?httpAccept=text\/plain","content-type":"text\/plain","content-version":"vor","intended-application":"text-mining"}],"deposited":{"date-parts":[[2025,9,11]],"date-time":"2025-09-11T10:00:57Z","timestamp":1757584857000},"score":1,"resource":{"primary":{"URL":"https:\/\/linkinghub.elsevier.com\/retrieve\/pii\/S0002937804018770"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2005,7]]},"references-count":19,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2005,7]]}},"alternative-id":["S0002937804018770"],"URL":"https:\/\/doi.org\/10.1016\/j.ajog.2004.11.006","relation":{},"ISSN":["0002-9378"],"issn-type":[{"value":"0002-9378","type":"print"}],"subject":[],"published":{"date-parts":[[2005,7]]},"assertion":[{"value":"Elsevier","name":"publisher","label":"This article is maintained by"},{"value":"Cervicovaginal fluid changes to detect ovulation accurately","name":"articletitle","label":"Article Title"},{"value":"American Journal of Obstetrics and Gynecology","name":"journaltitle","label":"Journal Title"},{"value":"https:\/\/doi.org\/10.1016\/j.ajog.2004.11.006","name":"articlelink","label":"CrossRef DOI link to publisher maintained version"},{"value":"article","name":"content_type","label":"Content Type"},{"value":"Copyright \u00a9 2005 Elsevier Inc. All rights reserved.","name":"copyright","label":"Copyright"}]}}