{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,2]],"date-time":"2026-09-02T12:54:29Z","timestamp":1788353669726,"version":"build-2803163510"},"reference-count":17,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2009,9,26]],"date-time":"2009-09-26T00:00:00Z","timestamp":1253923200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Intl J Gynecology &amp; Obste"],"published-print":{"date-parts":[[2010,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Objective<\/jats:title><jats:p>To study the relationship between cervical length measured by ultrasound and risk of preterm delivery.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>We measured cervical length in 2351 women between the 18th and 22nd week of pregnancy. Preterm delivery was categorized as before 37 weeks, before 34 weeks, and before 30 weeks.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Before the 37th week, the odds ratios (ORs) of spontaneous delivery for cervical lengths in the 3rd, 5th, and 10th percentiles were, respectively, 25.47 (95% confidence intervals [CI], 15.5\u201341.73); 16.98 (95% CI, 11.51\u201325.05); and 7.55 (95% CI, 5.44\u201310.5). Before the 34th week the ORs were 28.7 (95% CI, 14.54\u201341.73); 20.5 (95% CI, 11.51\u201025.05); and 10.3 (95% CI, 5.44\u201310.5). And before the 30th week they were 29.8 (95% CI, 15.54\u201341.73); 23.1 (95% CI, 11.51\u201325.05); and 19.1 (95% CI, 7.44\u201331.5). In predicting premature delivery, the sensitivity, specificity, positive predictive value, and negative predictive value of cervical length were 26%, 98%, 63.6%, and 93.57% for the 3rd percentile; 34%, 97%, 51%, and 94% for the 5th percentile; and 39%, 92%, 31%, and 94% for the 10th percentile.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Transvaginal measurement of cervical length during routine fetal morphological examination between the 18th and 22nd week of pregnancy helps identify asymptomatic women at risk for preterm delivery.<\/jats:p><\/jats:sec>","DOI":"10.1016\/j.ijgo.2009.08.018","type":"journal-article","created":{"date-parts":[[2009,9,27]],"date-time":"2009-09-27T04:09:43Z","timestamp":1254024583000},"page":"58-60","source":"Crossref","is-referenced-by-count":7,"title":["Preterm delivery and ultrasound measurement of cervical length in Gran Canaria, Spain"],"prefix":"10.1002","volume":"108","author":[{"given":"Miguel A.","family":"Barber","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Idoya","family":"Eguiluz","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Walter","family":"Plasencia","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Margarita","family":"Medina","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Leonor","family":"Valle","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jose A.","family":"Garcia","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2009,9,26]]},"reference":[{"key":"e_1_2_6_2_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0140-6736(08)60074-4"},{"key":"e_1_2_6_3_2","doi-asserted-by":"publisher","DOI":"10.2217\/17455057.4.6.625"},{"key":"e_1_2_6_4_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0140-6736(08)60108-7"},{"issue":"2","key":"e_1_2_6_5_2","first-page":"107","article-title":"Management of pregnancies with cervical shortening: a very short cervix is a very big problem","volume":"2","author":"Lee H.","year":"2009","journal-title":"Rev Obstet Gynecol"},{"key":"e_1_2_6_6_2","doi-asserted-by":"publisher","DOI":"10.1056\/NEJM199602293340904"},{"key":"e_1_2_6_7_2","doi-asserted-by":"publisher","DOI":"10.1002\/uog.47"},{"key":"e_1_2_6_8_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.ejogrb.2006.03.021"},{"key":"e_1_2_6_9_2","doi-asserted-by":"publisher","DOI":"10.1046\/j.1469-0705.1992.02060402.x"},{"key":"e_1_2_6_10_2","doi-asserted-by":"publisher","DOI":"10.1097\/00006250-200012000-00020"},{"key":"e_1_2_6_11_2","doi-asserted-by":"publisher","DOI":"10.1016\/S0029-7844(98)00346-9"},{"key":"e_1_2_6_12_2","doi-asserted-by":"publisher","DOI":"10.1002\/uog.2617"},{"key":"e_1_2_6_13_2","doi-asserted-by":"publisher","DOI":"10.1002\/uog.5174"},{"key":"e_1_2_6_14_2","doi-asserted-by":"publisher","DOI":"10.1056\/NEJMoa067815"},{"key":"e_1_2_6_15_2","doi-asserted-by":"publisher","DOI":"10.1002\/uog.5159"},{"key":"e_1_2_6_16_2","doi-asserted-by":"publisher","DOI":"10.1515\/JPM.2003.017"},{"key":"e_1_2_6_17_2","doi-asserted-by":"publisher","DOI":"10.1097\/00006254-200007000-00023"},{"key":"e_1_2_6_18_2","doi-asserted-by":"publisher","DOI":"10.1097\/01.ogx.0000206343.06995.36"}],"container-title":["International Journal of Gynecology &amp; 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