<?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>0300-9041</journal-id>
<journal-title><![CDATA[Ginecología y obstetricia de México]]></journal-title>
<abbrev-journal-title><![CDATA[Ginecol. obstet. Méx.]]></abbrev-journal-title>
<issn>0300-9041</issn>
<publisher>
<publisher-name><![CDATA[Federación Mexicana de Colegios de Obstetricia y Ginecología A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0300-90412018000200003</article-id>
<article-id pub-id-type="doi">10.24245/gom.v86i2.1634</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Estudio genético preimplantación para aneuploidias: resultados de la transición entre diferentes tecnologías]]></article-title>
<article-title xml:lang="en"><![CDATA[Preimplantation genetic testing for aneuploidies PGT-A: Results of the transition between different technologies]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Rioja]]></surname>
<given-names><![CDATA[MJ]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aguinaga-Ríos]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez-González]]></surname>
<given-names><![CDATA[CM]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Recio-López]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zavala-González]]></surname>
<given-names><![CDATA[PN]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Sánchez]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chávez-Badiola]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Nacional de Perinatología Isidro Espinosa de los Reyes  ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
</aff>
<aff id="Af2">
<institution><![CDATA[,New Hope Fertility Center  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,New Hope  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,New Hope  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2018</year>
</pub-date>
<volume>86</volume>
<numero>2</numero>
<fpage>96</fpage>
<lpage>107</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0300-90412018000200003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0300-90412018000200003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0300-90412018000200003&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  OBJETIVO  Comunicar los resultados obtenidos del análisis del estudio genético preimplantación para aneuploidias en dos centros de reproducción asistida de México en un periodo de tres años, utilizando dos diferentes técnicas moleculares.  MATERIALES Y MÉTODOS  Estudio observacional, retrospectivo, en donde se reporta el resultado de blastocistos sometidos a preimplantación para aneuploidias durante 2014-2017, en dos centros de reproducción asistida (Ciudad de México y Guadalajara).  RESULTADOS  Se analizaron 404 blastocistos de 129 pacientes (edad promedio 39 ± 4 años). Los embriones se dividieron en dos grupos según la técnica aplicada: 76 por a-CGH y 328 por secuenciación de nueva generación. El porcentaje de embriones euploides fue de 33%. Las aneuploidias numéricas fueron las más frecuentes. Hasta la terminación del estudio se habían transferido 69 embriones euploides con tasas de implantación de 78% para secuenciación de nueva generación y de 57% para a-CGH.  CONCLUSIONES  La tasa de implantación reportada en este estudio fue mayor con el análisis de preimplantación para aneuploidias por secuenciación de nueva generación. Los resultados reportados en nuestra experiencia soportan la necesidad de favorecer una opción de transferencia de embrión único. Es importante reconocer los retos de las nuevas tecnologías y la necesidad de técnicas moleculares más sensibles.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  OBJECTIVE  Communicate the results obtained from the analysis of the preimplantation genetic study for aneuploidy in two centers of assisted reproduction in Mexico in a period of three years, using two differentmolecular techniques.  MATERIALS AND METHODS  Descriptive, retrospective study, which reports the blastocysts PGT-A results, over 2014-2017, in two Fertility Centers (Ciudad de México and Guadalajara). The embryos where divided in two groups by their molecular techniques studied: 76 by a-CGH and 328 by NGS  RESULTS  We analyzed a total of 404 blastocysts from 129 patients (mean age 39 ± 4 years), with two different molecular techniques: a-CGH and NGS. The euploid embryos percentage was 33%. The numerical aneuploidies were the most frequent. Up to the ending of the study, 69% of the euploid embryos had been transferred. The implantation rates were 78% for those analyzed by NGS and 57% with a-CGH.  CONCLUSIONS  The implantation rate was bigger with the PGT-A by NGS. Our results reported, supports a single embryo transfer policy. It is important to recognize the challenges of new technologies and the need for more sensitive molecular techniques.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Prueba genética]]></kwd>
<kwd lng="es"><![CDATA[aneuploidia]]></kwd>
<kwd lng="es"><![CDATA[fertilización in vitro]]></kwd>
<kwd lng="es"><![CDATA[blastocisto]]></kwd>
<kwd lng="es"><![CDATA[implantación]]></kwd>
<kwd lng="es"><![CDATA[transferencia de embrión único]]></kwd>
<kwd lng="en"><![CDATA[Genetic testing]]></kwd>
<kwd lng="en"><![CDATA[Aneuploidies]]></kwd>
<kwd lng="en"><![CDATA[In vitro fertilization]]></kwd>
<kwd lng="en"><![CDATA[Blastocysts]]></kwd>
<kwd lng="en"><![CDATA[Implantation]]></kwd>
<kwd lng="en"><![CDATA[Single embryo transfer]]></kwd>
</kwd-group>
</article-meta>
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