<?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>0187-5337</journal-id>
<journal-title><![CDATA[Perinatología y reproducción humana]]></journal-title>
<abbrev-journal-title><![CDATA[Perinatol. Reprod. Hum.]]></abbrev-journal-title>
<issn>0187-5337</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Perinatología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-53372021000300081</article-id>
<article-id pub-id-type="doi">10.24875/per.19000067</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Alteraciones oftalmológicas en pacientes de 3 a 6 años de edad, productos de embarazos múltiples]]></article-title>
<article-title xml:lang="en"><![CDATA[Ophthalmological alterations in patients from 3 to 6 years of age, products of multiple pregnancies]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cruz-Ruíz]]></surname>
<given-names><![CDATA[Erasmo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Salgado-Valladares]]></surname>
<given-names><![CDATA[Manuel B.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Nacional de Perinatología Isidro Espinoza de los Reyes Departamento de Oftalmología ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<volume>35</volume>
<numero>3</numero>
<fpage>81</fpage>
<lpage>88</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-53372021000300081&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-53372021000300081&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-53372021000300081&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Objetivo: Determinar alteraciones oftalmológicas en pacientes de 3-6 años de edad, productos de embarazo múltiple, técnicas de reproducción asistida (PPEM TRA) y espontáneos (PPEM E).  Métodos: Estudio retrospectivo, observacional, descriptivo y transversal de enero de 1996 a julio del 2019. Muestra compuesta por 202 PPEM con exploración oftalmológica completa: 78 PPEM TRA y 124 PPEM E. Se distribuyeron por TRA, semanas de gestación, retinoscopia, edad y frecuencia de alteraciones anatómicas.  Resultados: Las ametropías más frecuentes fueron astigmatismo mixto (A.Mx), astigmatismo hipermetrópico compuesto (AHC), astigmatismo hipermetrópico simple (AHS) y astigmatismo miópico simple (AMS).  Conclusiones: Los defectos refractivos diagnosticados son similares a lo obtenido por diversos autores del ámbito nacional e internacional. La frecuencia de alteraciones oftalmológicas es más frecuente en PPEM TRA, pero más diversas en pacientes PPEM E.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Objective: To determine ophthalmological alterations in patients of 3-6 years of age, products of Multiple Pregnancy Assisted Reproduction Techniques (MPPP ART) and Spontaneous (MPPP S).  Methods: Retrospective, observational, descriptive, and cross-sectional study from January 1996 to July 2019. Sample composed of 202 Multiple Pregnancy Product Patients with complete ophthalmological examination 78 MPPP ART and 124 MPPP S. They were distributed by ART, weeks of gestation, retinoscopy, age, and frequency of anatomical alterations.  Results: The most frequent ametropias were mixed astigmatism (A.Mx), compound hyperopic astigmatism (CHA), simple hyperopic astigmatism (SHA) and simple myopic astigmatism (SMA).  Conclusions: The refractive defects diagnosed are similar to those obtained by various national and international authors. The frequency of ophthalmological alterations is more frequent in MPPP ART, but more diverse in MPPP S patients.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Ametropías]]></kwd>
<kwd lng="es"><![CDATA[Prematuros]]></kwd>
<kwd lng="es"><![CDATA[Embrazo múltiple]]></kwd>
<kwd lng="en"><![CDATA[Ametropias]]></kwd>
<kwd lng="en"><![CDATA[Premature]]></kwd>
<kwd lng="en"><![CDATA[Multiple pregnancy]]></kwd>
</kwd-group>
</article-meta>
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