<?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>S0300-90412024000700002</article-id>
<article-id pub-id-type="doi">10.24245/gom.v92i7.9700</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Análisis de 5,789 biopsias de trofoectodermo: desenlaces clínicos y probabilidad de embarazo en ciclos con prueba genética preimplantacional para aneuploidias]]></article-title>
<article-title xml:lang="en"><![CDATA[Analysis of 5,789 trophectoderm biopsies: clinical outcomes and pregnancy probability in preimplantation genetic testing for aneuploidy cycles]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Calull Bagó]]></surname>
<given-names><![CDATA[Anna]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González Ortega]]></surname>
<given-names><![CDATA[Claudia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cancino Villarreal]]></surname>
<given-names><![CDATA[Patricia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez Macías]]></surname>
<given-names><![CDATA[Ariana Arlen]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gutiérrez Gamiño]]></surname>
<given-names><![CDATA[Ana Mireya]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gutiérrez Gutiérrez]]></surname>
<given-names><![CDATA[Antonio Martín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto de Ciencias en Reproducción Humana Vida y Vida Genetics  ]]></institution>
<addr-line><![CDATA[León Guanajuato]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto de Ciencias en Reproducción Humana Vida y Vida Genetics  ]]></institution>
<addr-line><![CDATA[León Guanajuato]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto de Ciencias en Reproducción Humana Vida y Vida Genetics  ]]></institution>
<addr-line><![CDATA[León Guanajuato]]></addr-line>
<country>México</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Instituto de Ciencias en Reproducción Humana Vida y Vida Genetics  ]]></institution>
<addr-line><![CDATA[León Guanajuato]]></addr-line>
<country>México</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Instituto de Ciencias en Reproducción Humana Vida y Vida Genetics  ]]></institution>
<addr-line><![CDATA[León Guanajuato]]></addr-line>
<country>México</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>92</volume>
<numero>7</numero>
<fpage>275</fpage>
<lpage>284</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0300-90412024000700002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0300-90412024000700002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0300-90412024000700002&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  OBJETIVO:  Analizar la tasa de euploidia, los desenlaces clínicos y la probabilidad de lograr un embarazo en función de la edad de la madre, los blastocistos biopsiados y la calidad embrionaria.  MATERIALES Y MÉTODOS:  Estudio retrospectivo y descriptivo efectuado para evaluar las biopsias de trofoectodermo de los ciclos con prueba genética preimplantacional para aneuploidias de pacientes atendidas en Vida Genetics (León, Guanajuato) de noviembre de 2017 a marzo de 2023.  RESULTADOS:  Se evaluaron 5789 biopsias de trofoectodermo de 1442 ciclos de la prueba genética preimplantacional para aneuploidias mediante secuenciación masiva en mujeres de 18 a 48 años. Tasa global de euploidia por ciclo: 36.3%, aneuploidia: 57.2% y mosaicismmo: 6.5%. La tasa de euploidia disminuyó con el incremento de la edad de las madres (75% en 18 años, 0% en 47-48 años). Los embriones de buena calidad tuvieron mayores tasas de euploidia (50%) comparados con calidad regular (47%) y mala calidad (31.7%) (p &lt; 0.0001). Los embriones con biopsia en día 5 tuvieron tasas de euploidia mayores (42.7%) comparados con los de día 6 (32%) y día 7 (27.2%) (p &lt; 0.0001). La tasa de embarazo clínico fue del 60.4%, implantación 57.2% y aborto espontáneo 11.2%. La probabilidad de lograr, al menos, un embrión euploide fue mayor en las pacientes con mayor cantidad de blastocistos con biopsia. La probabilidad de lograr un embarazo con un embrión euploide se vio afectada por la calidad del embrión transferido.  CONCLUSIONES:  Se corrobora la asociación entre la edad materna avanzada y la tasa de aneuploidia. Destaca la repercusión de la calidad embrionaria y el día en que se toma la biopsia en los desenlaces de la prueba genética preimplantacional para aneuploidias y la importancia de la calidad del embrión en las tasas de éxito del tratamiento.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  OBJECTIVE:  To analyze the rate of euploidy, clinical outcomes, and the probability of achieving pregnancy as a function of maternal age, biopsied blastocysts, and embryo quality.  MATERIALS AND METHODS:  Retrospective and descriptive study performed to evaluate trophectoderm biopsies from cycles with preimplantation genetic testing for aneuploidy of patients seen at Vida Genetics (León, Guanajuato) from November 2017 to March 2023.  RESULTS:  5,789 trophectoderm biopsies from 1,442 cycles of preimplantation genetic testing for aneuploidy by massive sequencing were evaluated in women aged 18 to 48 years. The overall euploidy rate per cycle was 36.3%, aneuploidy 57.2%, and mosaicism 6.5%. The euploidy rate decreased with increasing maternal age (75.0% at 18 years, 0% at 47-48 years). Good quality embryos had a higher euploidy rate (50.0%) compared to fair quality (47.0%) and poor quality (31.7%) (p &lt; 0.0001). Embryos biopsied on day 5 had higher euploidy rates (42.7%) compared to day 6 (32.0%) and day 7 (27.2%) (p &lt; 0.0001). The clinical pregnancy rate was 60.4%, implantation 57.2% and miscarriage 11.2%. The probability of achieving at least one euploid embryo was higher in patients with a higher number of biopsied blastocysts. The probability of achieving pregnancy with a euploid embryo was influenced by the quality of the transferred embryo.  CONCLUSIONS:  The association between advanced maternal age and the rate of aneuploidy is confirmed. The influence of embryo quality and day of biopsy on the outcome of preimplantation genetic testing for aneuploidy and the importance of embryo quality for treatment success rates are highlighted.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Probabilidad]]></kwd>
<kwd lng="es"><![CDATA[embarazo]]></kwd>
<kwd lng="es"><![CDATA[edad materna]]></kwd>
<kwd lng="es"><![CDATA[biopsias]]></kwd>
<kwd lng="es"><![CDATA[pruebas genéticas]]></kwd>
<kwd lng="es"><![CDATA[aneupolidia]]></kwd>
<kwd lng="es"><![CDATA[blastocisto]]></kwd>
<kwd lng="en"><![CDATA[Probability]]></kwd>
<kwd lng="en"><![CDATA[Pregnancy]]></kwd>
<kwd lng="en"><![CDATA[Maternal age]]></kwd>
<kwd lng="en"><![CDATA[Biopsies]]></kwd>
<kwd lng="en"><![CDATA[Genetic testing]]></kwd>
<kwd lng="en"><![CDATA[Aneupolidy]]></kwd>
<kwd lng="en"><![CDATA[Blastocyst]]></kwd>
</kwd-group>
</article-meta>
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