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class="authors">Lyndon M. Hill</span> <div class="authorsAffiliationsList"> <ul> <li>Department of Ultrasound, Magee-Womens Hospital, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania</li> </ul> </div> <div class="toggleMenu articleToggleMenu"> <div class="toggleButton">Further Information<div class="toggleContent"> <div class="wrapper twoCols"> <div class="col"> <h3>Publication History</h3> <p>Publication Date:<br>04 March 2008 (online)</p> </div> </div> </div> </div> <div class="platformLink"> <span class="label"><a style="color: #000000; text-decoration: none" class="virtualLink">Also available at</a></span><a data-url="https://eref.thieme.de/10.1055/s-2007-999455" data-id="eRef" data-target="eRef" target="_blank" class="btnPlatformLink linkFunction" href="https://eref.thieme.de/10.1055/s-2007-999455"><img src="/media/10.1055-s-00000000/btn-eRef-desktop.png"></a> </div> </div> </div><ul class="tabBar borderBottom" id="articleTabs"> <li class="tab active"> <a href="#abstract">Abstract</a> </li> <li class="tab"> <a href="/products/ejournals/html/10.1055/s-2007-999455">Full Text</a> </li> </ul><div id="sections"> <section id="abstract"> <div class="articleFunctions"> <input value="ai10.1055/s-2007-999455,10.1055/s-2007-999455" name="ai" type="hidden"> <div style="display: none" id="sfx10.1055/s-2007-999455"> <a id="sfxServer" data-href="?id=doi:10.1055/s-2007-999455&sid=Thieme:Connect&jtitle=American Journal of Perinatology&issue=01&volume=7&date=1990&issn=0735-1631&spage=92&epage=93&aulast=Hill&aufirst=Lyndon M.&__char_set=utf8&atitle=Prevalence of Breech Presentation by Gestational Age" target="sfx"><span class="articleAccessLabel sfx"><img id="sfxImageUrl" src="" alt="SFX Search" height="15" width="52"></span></a> </div> <a style="display: none" href="/products/ejournals/buyDocument/10.1055/s-2007-999455" class="gotoLink" id="sasLink">Buy Article</a> <a data-url="https://s100.copyright.com/AppDispatchServlet" data-id="CCC RightsLink" data-target="CCC RightsLink" onClick="RightslinkPopUp("1098-8785", "Prevalence of Breech Presentation by Gestational Age", "03/04/2008", "Lyndon M. Hill", "", "10.1055/s-2007-999455", "92", "93", "7", "01", "")" class="gotoLink linkFunction" href="javascript:;">Permissions and Reprints</a> </div> <figure style="margin-left: 30px" class="floatRight"> <a data-doi="10.1055/s-2007-999455" data-caption="" data-id="10.1055-s-2007-999455-1.jpg" data-cssClass="previewOverlay" href="https://www.thieme-connect.de/media/ajp/199001/lookinside/10.1055-s-2007-999455-1.jpg" class="zoomFunction alignLeft"><img src="https://www.thieme-connect.de/media/ajp/199001/lookinside/thumbnails/10.1055-s-2007-999455-1.jpg"></a> <figcaption></figcaption> </figure> <h3>ABSTRACT</h3> <P>After studying 4024 consecutive patients at a gestational age of 28 weeks or older, the prevalence of breech presentation at 28 weeks was found to be 24.4%. By 37 weeks, the number of breech presentations had decreased to 3.7%.</P> </section> <section id="htmlfulltext"></section> <section id="references"></section> <section id="images"></section> <section id="supmat"> <ul class="tabBar borderBottom" id="supmatTabs"></ul> <div class="tabContentContainer"> <div style="padding-top: 0.5em" id="supportingMaterial" class="tabContent"> <ul class="linkList"></ul> </div> </div> </section> </div> <!-- end abstractText --> </article> <div class="metrics-container-main"> <div class="metrics-container-left"> <div class="metrics-container-cell"> <div class="metrics-altmetrics"><div data-doi="10.1055/s-2007-999455" class="altmetric-embed" data-link-target="_blank" data-badge-details="right" data-badge-type="donut" data-hide-no-mentions="true" ></div></div> </div> </div> <div class="metrics-container-right"> <div class="metrics-container-cell"> <!--TC-1960--> <div id="crossrefcites" class="crossrefcites" data-doi="10.1055/s-2007-999455"/></div> </div> </div> </div> <!-- start general/_adBoxPanel.gsp --> <div id="adSidebarOverBottom"> <script type="text/javascript"> window.TCFUtility.writeScript([ 'https://adfarm1.adition.com/js?wp_id=4863507&gdpr=${GDPR}&gdpr_consent=${GDPR_CONSENT_39}&prf[DOI]=10.1055-s-00000009&prf[UserLogin]=false&prf[IPLogin]=false&prf[MASTERKEY]=10.1055-s-00000009, false, false&prf[HWG]=false' ]); 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// URL zum Abholen der Ausgaben zusammenbauen var url = jsContextPath + '/json/issues?shortname=' + shortname + '&year=' + year; // Request vorbereiten var xmlHttp = null; // Mozilla, Opera, Safari sowie Internet Explorer (ab v7) if (typeof XMLHttpRequest != 'undefined') { xmlHttp = new XMLHttpRequest(); } if (!xmlHttp) { // Internet Explorer 6 und älter try { xmlHttp = new ActiveXObject("Msxml2.XMLHTTP"); } catch (e) { try { xmlHttp = new ActiveXObject("Microsoft.XMLHTTP"); } catch (e) { xmlHttp = null; } } } // URL abschicken und Dropdownbox fuellen if (xmlHttp) { xmlHttp.open('GET', url, true); xmlHttp.onreadystatechange = function() { if (xmlHttp.readyState == 4) { var issues = eval('(' + xmlHttp.responseText + ')'); if (isDisplayVolume == true) { if (issues.length > 1) { var showVolume = false; var comparedIssue = null; var ids = []; for (var i = 0; i < issues.length; i++) { if (issues[i]['number'].indexOf('S ') > -1 || issues[i]['number'].toLowerCase() == issues[i]['number'].toUpperCase()) { if (comparedIssue == null) { comparedIssue = issues[i]; } ids.push(i); } } for (var i = 0; i < ids.length; i++) { if (issues[i]['volume'] != comparedIssue['volume']) { showVolume = true; break; } } } } var html = ""; for (var i = 0; i < issues.length; i++) { html += "<li><a href='"+jsContextPath+"/ejournals/issue/" + issues[i]['doi'] + "'>"; if (showVolume == true && issues[i]['volume'] != null && issues[i]['volume'].length > 0) { html += "Vol " + issues[i]['volume'] + " ("; } html += issues[i]['number']; if (showVolume == true && issues[i]['volume'] != null && issues[i]['volume'].length > 0) { html += ")"; } html += ": "; if(issues[i]['pages'] != null) { html += issues[i]['pages']; } html += "</a></li>" ; } $('#issue').html(html); $('#currentYear').html(year); } }; xmlHttp.send(null); } } // laedt beim Wechsel des Jahres die Dropdownboxen function getIssues(year) { // Ausgabenliste holen loadIssues(document.toc.shortname.value, year); } // laedt beim Refresh der Seite die Ausgabenliste function setIssues(year) { // falls nur eFirst vorhanden gar keine Ausgaben laden if (year > 0) { // Ausgabenliste holen loadIssues(document.toc.shortname.value, year); }else{ } } </script> <script type="text/javascript"> $(document).ready(function() { if ($("#crossrefcites").length > 0) { var doi = $("#crossrefcites").data("doi"); var ajaxUrl = jsContextPath + "/json/getCrossrefCites?doi=" + doi; $.ajax({ url: ajaxUrl, type: "GET", dataType: "html", success: function (data) { $('#crossrefcites').html(data); }, error: function (xhr, status) { console.log("Cannot retrieve crossref cites for the doi " + doi + "."); }, complete: function (xhr, status) { } }); } }); $('#crossrefcites').click(function(e){ var doi = $("#crossrefcites").data("doi"); var citesHTMLContent = "<div style=\"font-family: sans-serif; font-size: 12px; line-height: 140%\">"; citesHTMLContent += document.getElementById('crossrefCitesDetails').innerHTML; citesHTMLContent += "</div>"; var crossrefCitesWindowHeight = Math.floor($(window).height() / 2); var crossrefCitesWindowWidth = Math.floor($(window).width() / 2); var crossrefCitesWindowTop = Math.floor($(window).height() / 4); var crossrefCitesWindowLeft = Math.floor($(window).width() / 4); var crossrefCitesSize = "width="; crossrefCitesSize += crossrefCitesWindowWidth; crossrefCitesSize += ",height="; crossrefCitesSize += crossrefCitesWindowHeight; crossrefCitesSize += ",left="; crossrefCitesSize += crossrefCitesWindowLeft; crossrefCitesSize += ",top="; crossrefCitesSize += crossrefCitesWindowTop; crossrefCitesSize += ",scrollbars=1"; var crossrefCitesWindow = window.open("", "newWindow", crossrefCitesSize); crossrefCitesWindow.focus(); crossrefCitesWindow.document.writeln(); crossrefCitesWindow.document.writeln(citesHTMLContent); document.head.insertAdjacentHTML("afterbegin", "<style>body { font-size: 12px; line-height: 140%; font-family: sans-serif; color: #000; }"); crossrefCitesWindow.document.title = doi + " Crossref Cited-by"; crossrefCitesWindow.document.close(); }); </script> <script type="text/javascript"> $(".zoomFunction, .imageFunction, .audioFunction, .videoFunction, .podcastFunction").click(function() { var id = $(this).attr("data-id"); var caption = encodeURIComponent($(this).attr("data-caption")); var doi = $(this).attr("data-doi"); var mediaType = "image"; if ($(this).attr('class').indexOf('podcastFunction') > -1) { mediaType = "podcast"; } else if ($(this).attr('class').indexOf('audioFunction') > -1) { mediaType = "audio"; } else if ($(this).attr('class').indexOf('videoFunction') > -1) { mediaType = "video"; } submitMediaEvent(mediaType, id, caption, doi); }); function submitMediaEvent(mediaType, id, caption, doi) { const url = '/products/json/submitMediaStatisticsEvent?mediaType=' + mediaType + '&id=' + id + '&caption=' + caption + '&doi=' + doi; const request = $.ajax({ type : 'GET', async : true, cache: false, url, success : function(data) { } }); } $(".linkFunction").click(function() { var target = $(this).attr("data-target"); var id = $(this).attr("data-id"); var uri = encodeURIComponent($(this).attr("data-url")); const url = '/products/json/submitLinkStatisticsEvent?target=' + target + '&id=' + id + '&url=' + uri; const request = $.ajax({ type : 'GET', async : true, cache: false, url, success : function(data) { } }); 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