<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0026-1742</journal-id>
<journal-title><![CDATA[Revista de la Facultad de Medicina (México)]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Fac. Med. (Méx.)]]></abbrev-journal-title>
<issn>0026-1742</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Facultad de Medicina]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0026-17422022000400030</article-id>
<article-id pub-id-type="doi">10.22201/fm.24484865e.2022.65.4.04</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Nudo verdadero de cordón umbilical, hallazgo incidental al nacimiento. Reporte de 4 casos en un hospital de tercer nivel]]></article-title>
<article-title xml:lang="en"><![CDATA[True Umbilical Cord Knot, an Incidental Finding at Birth. Report of 4 Cases in a Third Level Hospital]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arriaga López]]></surname>
<given-names><![CDATA[Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Álvarez Torres]]></surname>
<given-names><![CDATA[Alfredo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Leyva Díaz]]></surname>
<given-names><![CDATA[Andrea]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cuevas Arellano]]></surname>
<given-names><![CDATA[Gladys Georgina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chavira Anaya]]></surname>
<given-names><![CDATA[Cynthia Fabiola]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Mexicano del Seguro Social Hospital de Ginecología y Obstetricia No. 4 &#8220;Luis Castelazo Ayala&#8221; ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Mexicano del Seguro Social Hospital General de Zona No. 33 ]]></institution>
<addr-line><![CDATA[Bahía de Banderas Nayarit]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2022</year>
</pub-date>
<volume>65</volume>
<numero>4</numero>
<fpage>30</fpage>
<lpage>37</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0026-17422022000400030&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0026-17422022000400030&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0026-17422022000400030&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El nudo verdadero de cordón umbilical es una patología con una incidencia relativamente baja. Se asocia a riesgo de pérdida del bienestar fetal y muerte perinatal. Existen factores de riesgo tanto maternos como fetales, con diferentes resultados perinatales asociados. El diagnóstico prenatal es un reto para el obstetra y la mayoría de casos son hallazgos al nacimiento, sin embargo, hoy en día se dispone de métodos ecográficos para su búsqueda intencionada, principalmente en pacientes con factores de riesgo. De igual forma debe sospecharse ante la presencia de un registro cardiotocográfico no tranquilizante, sobre todo cuando no existe respuesta a las maniobras habituales de reanimación intrauterina, como la posición en decúbito lateral izquierdo, oxígeno suplementario e hidratación materna. El objetivo del presente reporte es describir 4 casos de nudo verdadero en embarazos a término en un hospital de tercer nivel, en donde se estimó una incidencia del 0.03%, con una edad gestacional promedio de 39.3 semanas y una media de edad materna de 32.2 años. Los principales hallazgos intraparto fueron alteraciones en el registro cardiotocográfico, tales como desaceleraciones variables y tardías. La resolución del embarazo fue por vía vaginal en 2 de las pacientes, mientras que las otras 2 se resolvieron mediante cesárea. Se registró un caso de muerte perinatal.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The true umbilical cord knot is a pathology with an incidence relatively low. It is associated with the risk of loss of fetal well-being and stillbirth. There are both maternal and fetal risk factors, with different associated perinatal outcomes. Prenatal diagnosis of a true knot is a diagnostic challenge for the obstetrician, however, nowadays it is possible by ultrasound for incidental finding or by intentional search, mainly in patients with risk factors. In the same way it should be suspected in the presence of a non-reassuring cardiotocography, especially when there is no response to the usual intrauterine resuscitation maneuvers, such as left lateral decubitus position, supplemental oxygen and maternal hydration. The purpose of this report is to describe 4 cases of true knot in term pregnancies, in a third level hospital, where an incidence of 0.03% was estimated,, with a mean gestational age of 39.3 weeks and a mean maternal age of 32.2 years. The main intrapartum findings were alterations in the cardiotocography, such as variable and late decelerations. The route of pregnancy resolution was equitable among the patients, 2 were resolved by vaginal delivery and the other 2 by cesarean section. Pregnancy was resolved by vaginal delivery in 2 of the patients, while the other 2 were resolved by cesarean section. One case of stillbirth was registered]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Cordón umbilical]]></kwd>
<kwd lng="es"><![CDATA[nudo verdadero]]></kwd>
<kwd lng="es"><![CDATA[diagnóstico prenatal]]></kwd>
<kwd lng="es"><![CDATA[resultados perinatales adversos]]></kwd>
<kwd lng="en"><![CDATA[Umbilical cord]]></kwd>
<kwd lng="en"><![CDATA[true knot]]></kwd>
<kwd lng="en"><![CDATA[perinatal outcomes]]></kwd>
<kwd lng="en"><![CDATA[prenatal diagnosis]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>1</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Szczepanik]]></surname>
<given-names><![CDATA[ME]]></given-names>
</name>
<name>
<surname><![CDATA[Wittich]]></surname>
<given-names><![CDATA[AC.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[True Knot of the Umbilical Cord: report of 13 cases]]></article-title>
<source><![CDATA[Mil Med]]></source>
<year>2007</year>
<volume>172</volume>
<numero>8</numero>
<issue>8</issue>
<page-range>892-4</page-range></nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Spellacy]]></surname>
<given-names><![CDATA[WN]]></given-names>
</name>
<name>
<surname><![CDATA[Gravem]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Fisch]]></surname>
<given-names><![CDATA[RO.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The umbilical cord complications of true knots, nuchal coils, and cords around the body]]></article-title>
<source><![CDATA[American J Obstet Gynecol]]></source>
<year>1966</year>
<volume>94</volume>
<numero>8</numero>
<issue>8</issue>
<page-range>1136-42</page-range></nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Castro]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Gomez-Suarez]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Diagnóstico prenatal de un nudo verdadero de cordón umbilical mediante 4D]]></article-title>
<source><![CDATA[Clin Invest Ginecol Obstet]]></source>
<year>2007</year>
<volume>34</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>208-10</page-range></nlm-citation>
</ref>
<ref id="B4">
<label>4</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ramón y Cajal]]></surname>
<given-names><![CDATA[CL]]></given-names>
</name>
<name>
<surname><![CDATA[Martínez]]></surname>
<given-names><![CDATA[RO.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Prenatal diagnosis of true knot of the umbilical cord]]></article-title>
<source><![CDATA[Ultrasound Obstet Gynecol]]></source>
<year>2004</year>
<volume>23</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>99-100</page-range></nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Peesay]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Nuchal cord and its implications]]></article-title>
<source><![CDATA[Matern Health Neonatol Perinatol]]></source>
<year>2017</year>
<volume>3</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>1-11</page-range></nlm-citation>
</ref>
<ref id="B6">
<label>6</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bernardete]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Niza]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Nudos verdaderos de cordón umbilical. Reporte de 4 casos]]></article-title>
<source><![CDATA[An Med (Mex)]]></source>
<year>2015</year>
<volume>60</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>137-40</page-range></nlm-citation>
</ref>
<ref id="B7">
<label>7</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Guzikowski]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
<name>
<surname><![CDATA[Kowalczyk]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Wi&#281;cek]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Diagnosis of true umbilical cord knot]]></article-title>
<source><![CDATA[Arch Med Sci]]></source>
<year>2014</year>
<volume>10</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>91-5</page-range></nlm-citation>
</ref>
<ref id="B8">
<label>8</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Olaya-Contreras]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Vargas-Moreno]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
<name>
<surname><![CDATA[Bernal-Villegas]]></surname>
<given-names><![CDATA[JE.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Una aproximación desde la física a las consecuencias patológicas de la longitud excesiva del cordón umbilical]]></article-title>
<source><![CDATA[Rev Colomb Obstet Ginecol]]></source>
<year>2015</year>
<volume>66</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>53</page-range></nlm-citation>
</ref>
<ref id="B9">
<label>9</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Srinivasan]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Graves]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Four true umbilical cord knots]]></article-title>
<source><![CDATA[J Obstet Gynaecol Can]]></source>
<year>2006</year>
<volume>28</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>32-5</page-range></nlm-citation>
</ref>
<ref id="B10">
<label>10</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Clerici]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Koutras]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Lizietti]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Di Renzo]]></surname>
<given-names><![CDATA[GC.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Multiple true umbilical knots: a silent risk for intrauterine growth restriction with anomalous hemodynamic pattern]]></article-title>
<source><![CDATA[Fetal Diagn Ther]]></source>
<year>2007</year>
<volume>22</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>440-3</page-range></nlm-citation>
</ref>
<ref id="B11">
<label>11</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chung Delgado]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Gil Oliden]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Desaceleración intraparto por nudo verdadero ajustado de cordón umbilical]]></article-title>
<source><![CDATA[RCCI]]></source>
<year>2014</year>
<volume>5</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>89-92</page-range></nlm-citation>
</ref>
<ref id="B12">
<label>12</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pasquale]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Pasquale]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Fatal True Umbilical Cord Knot: a Case Report]]></article-title>
<source><![CDATA[EuroMediterranean Biomed J]]></source>
<year>2019</year>
<volume>14</volume>
<numero>7</numero>
<issue>7</issue>
<page-range>30-3</page-range></nlm-citation>
</ref>
<ref id="B13">
<label>13</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ayres]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Spong]]></surname>
<given-names><![CDATA[CY]]></given-names>
</name>
<name>
<surname><![CDATA[Chandraharan]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[FIGO Intrapartum Fetal Monitoring Expert Consensus Panel. FIGO consensus guidelines on intrapartum fetal monitoring: Cardiotocography]]></article-title>
<source><![CDATA[Int J Gynaecol Obstet]]></source>
<year>2015</year>
<volume>131</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>13-24</page-range></nlm-citation>
</ref>
<ref id="B14">
<label>14</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pinas]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Chandraharan]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Continuous cardiotocography during labour: Analysis, classification and management]]></article-title>
<source><![CDATA[Best Pract Res Clin Obstet Gynaecol]]></source>
<year>2016</year>
<volume>30</volume>
<page-range>33-47</page-range></nlm-citation>
</ref>
<ref id="B15">
<label>15</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Macones]]></surname>
<given-names><![CDATA[GA]]></given-names>
</name>
<name>
<surname><![CDATA[Hankins]]></surname>
<given-names><![CDATA[GD]]></given-names>
</name>
<name>
<surname><![CDATA[Spong]]></surname>
<given-names><![CDATA[CY]]></given-names>
</name>
<name>
<surname><![CDATA[Hauth]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Moore]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The 2008 National Institute of Child Health and Human Development workshop report on electronic fetal monitoring: update on definitions, interpretation, and research guidelines]]></article-title>
<source><![CDATA[Obstet Gynecol]]></source>
<year>2008</year>
<volume>112</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>661-6</page-range></nlm-citation>
</ref>
<ref id="B16">
<label>16</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hamilton]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Warrick]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[O&#8217;Keeffe]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Variable decelerations: do size and shape matter?]]></article-title>
<source><![CDATA[J Matern Fetal Neonatal Med]]></source>
<year>2012</year>
<volume>25</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>648-53</page-range></nlm-citation>
</ref>
<ref id="B17">
<label>17</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Holzmann]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Wretler]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Cnattingius]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Nordström]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Cardiotocography patterns and risk of intrapartum fetal acidemia]]></article-title>
<source><![CDATA[J Perinat Med]]></source>
<year>2015</year>
<volume>43</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>473-9</page-range></nlm-citation>
</ref>
<ref id="B18">
<label>18</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cahill]]></surname>
<given-names><![CDATA[AG]]></given-names>
</name>
<name>
<surname><![CDATA[Roehl]]></surname>
<given-names><![CDATA[KA]]></given-names>
</name>
<name>
<surname><![CDATA[Odibo]]></surname>
<given-names><![CDATA[AO]]></given-names>
</name>
<name>
<surname><![CDATA[Macones]]></surname>
<given-names><![CDATA[GA.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Association and prediction of neonatal acidemia]]></article-title>
<source><![CDATA[Am J Obstet Gynecol]]></source>
<year>2012</year>
<volume>207</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>206.e1-8</page-range></nlm-citation>
</ref>
<ref id="B19">
<label>19</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hershkovitz]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Siberstein]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Sheiner]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Risk factors associated with true knots of the umbilical cord]]></article-title>
<source><![CDATA[Eur J Obstet Gynecol Reprod Biol]]></source>
<year>2001</year>
<volume>98</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>36-9</page-range></nlm-citation>
</ref>
<ref id="B20">
<label>20</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chasnoff]]></surname>
<given-names><![CDATA[IJ]]></given-names>
</name>
<name>
<surname><![CDATA[Fletcher]]></surname>
<given-names><![CDATA[MA.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[True knot of the umbilical cord]]></article-title>
<source><![CDATA[Am J Obstet Gynecol]]></source>
<year>1977</year>
<volume>127</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>425-7</page-range></nlm-citation>
</ref>
<ref id="B21">
<label>21</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ugianskiene]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Bor]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A rare case with multiple true knots together with single artery and four umbilical cord nuchal loops]]></article-title>
<source><![CDATA[Eur J Obstet Gynecol Reprod Biol]]></source>
<year>2013</year>
<volume>168</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>117-8</page-range></nlm-citation>
</ref>
<ref id="B22">
<label>22</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sepulveda]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
<name>
<surname><![CDATA[Shennan]]></surname>
<given-names><![CDATA[AH]]></given-names>
</name>
<name>
<surname><![CDATA[Bower]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[True knot of the umbilical cord: a difficult prenatal sonographic diagnosis]]></article-title>
<source><![CDATA[Ultrasound Obstet Gynecol]]></source>
<year>1995</year>
<volume>5</volume>
<page-range>106-8</page-range></nlm-citation>
</ref>
<ref id="B23">
<label>23</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bohîltea]]></surname>
<given-names><![CDATA[RE]]></given-names>
</name>
<name>
<surname><![CDATA[Turcan]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Cîrstoiu]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Prenatal ultrasound diagnosis and pregnancy outcome of umbilical cord knot - debate regarding ethical aspects of a series of cases]]></article-title>
<source><![CDATA[J Med Life]]></source>
<year>2016</year>
<volume>9</volume>
<page-range>297-301</page-range></nlm-citation>
</ref>
<ref id="B24">
<label>24</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sherer]]></surname>
<given-names><![CDATA[DM]]></given-names>
</name>
<name>
<surname><![CDATA[Amoabeng]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
<name>
<surname><![CDATA[Dryer]]></surname>
<given-names><![CDATA[AM]]></given-names>
</name>
<name>
<surname><![CDATA[Dalloul]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Current Perspectives of Prenatal Sonographic Diagnosis and Clinical Management Challenges of True Knot of the Umbilical Cord]]></article-title>
<source><![CDATA[Int J Womens Health]]></source>
<year>2020</year>
<volume>12</volume>
<page-range>221-33</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
