{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,6]],"date-time":"2026-03-06T03:25:04Z","timestamp":1772767504228,"version":"3.50.1"},"reference-count":26,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2013,7,7]],"date-time":"2013-07-07T00:00:00Z","timestamp":1373155200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["obgyn.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Ultrasound in Obstet &amp;amp; Gyne"],"published-print":{"date-parts":[[2013,8]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:sec><jats:title>Objective<\/jats:title><jats:p>The aim of this study was to assess the role of the cerebroplacental ratio (<jats:styled-content style=\"fixed-case\">CPR<\/jats:styled-content>), i.e. the ratio between the middle cerebral artery and umbilical artery pulsatility indices, in detecting fetal compromise in prolonged pregnancy.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Women attending a dedicated postdates clinic at 41 weeks' gestation were recruited for the study and <jats:styled-content style=\"fixed-case\">CPR<\/jats:styled-content> was calculated at 41+3 weeks. Induction of labor was offered at 42 weeks to those women still undelivered. Unfavorable outcome was defined as cord arterial <jats:styled-content style=\"fixed-case\">pH<\/jats:styled-content> &lt;\u20097.15 with a base deficit of &gt;\u200911\u2009<jats:styled-content style=\"fixed-case\">mM<\/jats:styled-content>\/L or operative delivery for abnormal intrapartum fetal electrocardiogram <jats:styled-content style=\"fixed-case\">ST<\/jats:styled-content>\u2010segment analysis. The 5<jats:sup>th<\/jats:sup> centiles of the <jats:styled-content style=\"fixed-case\">CPR<\/jats:styled-content>, obtained from published reference ranges (0.90) and from our population (0.98), were used as lower cut\u2010off values.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Three hundred and twenty women who reached a gestational age of over 41 weeks were eligible for inclusion in the study. The median gestational age at delivery was 294 (range, 289\u2013300) days. Unfavorable outcome was observed in 58\/320 pregnancies. There was no significant difference in the proportion of unfavorable outcomes between the two groups defined using either <jats:styled-content style=\"fixed-case\">CPR<\/jats:styled-content> cut\u2010off value (both P\u2009&gt;\u20090.05).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p><jats:styled-content style=\"fixed-case\">CPR<\/jats:styled-content> is not predictive of unfavorable outcome in women with pregnancies lasting more than 41 weeks. Copyright \u00a9 2012 ISUOG. 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