<?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>S0300-90412025000800002</article-id>
<article-id pub-id-type="doi">10.24245/gom.v93i8.208</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Trascendencia de la edad de la receptora en la tasa de embarazo en ciclos de donación de óvulos]]></article-title>
<article-title xml:lang="en"><![CDATA[Impact of the age of the recipient on the pregnancy rate in egg donation cycles]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González Gárza]]></surname>
<given-names><![CDATA[Erika Lizeth]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Robellada Za&#769;rate]]></surname>
<given-names><![CDATA[Claudia Melina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carballo Mondragón]]></surname>
<given-names><![CDATA[Esperanza]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ambe]]></surname>
<given-names><![CDATA[Alberto Kably]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Unidad de Reproducción Asistida  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Unidad de Reproducción Asistida  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,aff3  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Hospital Ángeles Lomas  ]]></institution>
<addr-line><![CDATA[ Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2025</year>
</pub-date>
<volume>93</volume>
<numero>8</numero>
<fpage>295</fpage>
<lpage>299</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0300-90412025000800002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0300-90412025000800002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0300-90412025000800002&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  OBJETIVO:  Determinar si la edad de la mujer afecta la tasa de embarazo en receptoras de ovocitos.  MATERIALES Y MÉTODOS:  Estudio retrospectivo, observacional y descriptivo llevado a cabo en pacientes atendidas en el Centro Mexicano de Fertilidad Dr. Alberto Kably entre los años 2005 a 2022 en pacientes en tratamiento con ciclos de fertilización in vitro y donación de óvulos. El análisis estadístico se procesó en el programa SPSS; el valor de p &lt; 0.05 se consideró estadísticamente significativo.  RESULTADOS:  Se estudiaron 743 pacientes, divididas en 5 grupos: menores de 30 años, 31 a 35, 35 a 39, 40 a 44 y mayores de 45. El grupo de edad mayoritario fue el de 40 a 44 años (42.8%). La tasa de embarazo fue mayor en el grupo de 30 an&#771;os en comparación con las mayores de 45 (p = 0.02). La mayor probabilidad de aborto se registró en las pacientes mayores de 45 an&#771;os, con una tendencia más marcada cuando se compararon con las menores de 30 y las de 40 a 44 an&#771;os (p = 0.001). En relación con el grosor endometrial se detectó una disminución en el porcentaje de embarazo cuando se hicieron transferencias de embriones con un grosor endometrial de 6 mm o menos así como 15 mm o más, antes del inicio de la progesterona.  CONCLUSIÓN:  Los resultados coinciden con algunos estudios reportados en la bibliografía en los que se comunica una diferencia significativa en la tasa de embarazo relacionada con la edad de las pacientes receptoras de ovocitos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  OBJECTIVE:  To determine whether a woman&#8217;s age affects the pregnancy rate in oocyte recipients.  METHODS AND MATERIALS:  This retrospective, observational, descriptive study was conducted on patients who underwent in vitro fertilization and egg donation cycles at the Dr. Alberto Kably Mexican Fertility Center between 2005 and 2022. A p-value of less than 0.05 was considered statistically significant, and statistical analysis was performed using SPSS software.  RESULTS:  A total of 743 patients were studied and divided into five groups based on age: under 30, 31 to 35, 36 to 40, 41 to 45, and over 45 years old. The largest group was 40 to 44 years old (42.8%). The pregnancy rate was higher in the under-30 group than in those over 45 (p = 0.02). The highest miscarriage rate was recorded in patients over 45 years of age, with a more pronounced trend compared to patients under 30 and aged 40 to 44 (p = 0.001). Regarding endometrial thickness, a decrease in the pregnancy rate was observed when embryo transfers were performed with an endometrial thickness of 6 mm or less or 15 mm or more before progesterone administration.  CONCLUSION:  These results are consistent with previous studies that reported a significant difference in pregnancy rates related to the age of oocyte recipients.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Fertilización in vitro]]></kwd>
<kwd lng="es"><![CDATA[transferencia de embriones]]></kwd>
<kwd lng="es"><![CDATA[edad avanzada]]></kwd>
<kwd lng="es"><![CDATA[donación de óvulos]]></kwd>
<kwd lng="es"><![CDATA[tasa de embarazo]]></kwd>
<kwd lng="es"><![CDATA[progesterona]]></kwd>
<kwd lng="en"><![CDATA[In vitro fertilization]]></kwd>
<kwd lng="en"><![CDATA[Embryo transfers]]></kwd>
<kwd lng="en"><![CDATA[Middle aged]]></kwd>
<kwd lng="en"><![CDATA[Egg donation]]></kwd>
<kwd lng="en"><![CDATA[Pregnancy rate]]></kwd>
<kwd lng="en"><![CDATA[Progesterone]]></kwd>
</kwd-group>
</article-meta>
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