<?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>1684-1824</journal-id>
<journal-title><![CDATA[Revista Médica Electrónica]]></journal-title>
<abbrev-journal-title><![CDATA[Rev.Med.Electrón.]]></abbrev-journal-title>
<issn>1684-1824</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Ciencias Médicas de Matanzas]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1684-18242024000100073</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Estereología en placentas procedentes de gestaciones gemelares]]></article-title>
<article-title xml:lang="en"><![CDATA[Stereology in placentas from twin pregnancies]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gutiérrez-Núñez]]></surname>
<given-names><![CDATA[Rafael]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Leyva-Escalona]]></surname>
<given-names><![CDATA[Olegario]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alarcón-Zamora]]></surname>
<given-names><![CDATA[Dielvis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gutiérrez-Alarcón]]></surname>
<given-names><![CDATA[Beatriz María]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castillo-Alarcón]]></surname>
<given-names><![CDATA[Damaris Nilvia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Ciencias Médicas de Granma  ]]></institution>
<addr-line><![CDATA[ Granma]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2024</year>
</pub-date>
<volume>46</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S1684-18242024000100073&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S1684-18242024000100073&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S1684-18242024000100073&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Introducción:  La disfunción placentaria origina complicaciones fetales; de manera más frecuente, la restricción del crecimiento intrauterino y la preclampsia.  Objetivo:  Identificar el patrón estereológico en placentas gemelares, y su relación con la corionicidad y el peso del recién nacido.  Métodos:  Se realizó un estudio descriptivo en una muestra de 16 gestantes gemelares, 25 placentas y 32 recién nacidos. Se estudiaron las variables peso del recién nacido, número de vellosidades, superficie vellositaria total, área vellositaria, área de nodos, densidad óptica de fibrina en la superficie vellositaria y densidad óptica de fibrina alrededor del vaso.  Resultados:  Existió relación directa entre el número de vellosidades y la superficie vellositaria total. En las placentas monocoriónicas hubo predominio de recién nacidos bajo peso. Se percibe una diferencia en los resultados de área, según el tipo placentario y la región topográfica. En las placentas monocoriales se observó mayor área, tanto de la vellosidad placentaria como en los nodos sincitiales, siendo el área de la vellosidad mayor en la periferia placentaria, y el área de nodos sincitiales en la región 4 cm del cordón umbilical.  Conclusiones:  La estereología microscópica a nivel pericordón, a 4 cm del cordón y en la periferia del disco placentario, arrojó diferencias significativas para el área de la vellosidad y la densidad óptica de fibrina en la superficie de la vellosidad. Los valores promedio para el área de nodos sincitiales y la densidad óptica de fibrina alrededor del vaso no mostraron diferencias estadísticamente significativas. Es la corionicidad un predictor del bajo peso al nacer.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Introduction:  Placental dysfunction causes fetal complications; more frequently, intrauterine growth restriction and preeclampsia.  Objective:  To identify the stereological pattern in twin placentas, and its relationship with chorionicity and weight of the newborn.  Methods:  A descriptive study was carried out in a sample of 16 women with twin pregnancy, 25 placentas and 32 newborns. The variables weight of the newborn, number of villi, total villous surface, villous area, node area, optical density of fibrin on the villous surface and optical density of fibrin around the vessel were studied.  Results:  There was a direct relationship between the number of villi and the total villous surface. In monochorionic placentas there was a predominance of low birth weight newborns. A difference is observed in the area results according to the placental type and the topographic region. In monochorionic placentas, a greater area was observed, both in the placental villus and in the syncytial nodes, with the villus area being greater in the placental periphery and the area of syncytial nodes in the region 4 cm from the umbilical cord.  Conclusions:  Microscopic stereology at the perichordal level, 4 cm from the cord and at the periphery of the placental disc showed significant differences for the villus area and fibrin optical density on the villus surface. The average values for the area of syncytial nodes and the optical density of fibrin around the vessel did not show statistically significant differences. Chorionicity is a predictor of low birth weight.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[estereología]]></kwd>
<kwd lng="es"><![CDATA[gemelar]]></kwd>
<kwd lng="es"><![CDATA[placenta]]></kwd>
<kwd lng="es"><![CDATA[vellosidades]]></kwd>
<kwd lng="es"><![CDATA[fibrina]]></kwd>
<kwd lng="es"><![CDATA[densidad]]></kwd>
<kwd lng="en"><![CDATA[stereology]]></kwd>
<kwd lng="en"><![CDATA[twin]]></kwd>
<kwd lng="en"><![CDATA[placenta]]></kwd>
<kwd lng="en"><![CDATA[villi]]></kwd>
<kwd lng="en"><![CDATA[fibrin]]></kwd>
<kwd lng="en"><![CDATA[density]]></kwd>
</kwd-group>
</article-meta>
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