<?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>S0300-90412017001000659</article-id>
<article-id pub-id-type="doi">10.24245/gom.v85i10.1482</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Tasas de embarazo en el primer ciclo de inseminación intrauterina en pacientes estimuladas con gonadotropinas según el desarrollo folicular y edad]]></article-title>
<article-title xml:lang="en"><![CDATA[Pregnancy rates in the first cycle of intrauterine insemination with gonadotropin stimulation in relation to number of follicles and age]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Amézquita-Vizcarra]]></surname>
<given-names><![CDATA[LE]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barros-Delgadillo]]></surname>
<given-names><![CDATA[JC]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Muñoz-Manrique]]></surname>
<given-names><![CDATA[CG]]></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[,Instituto Nacional de Perinatología Isidro Espinosa de los Reyes  ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Nacional de Perinatología Isidro Espinosa de los Reyes  ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2017</year>
</pub-date>
<volume>85</volume>
<numero>10</numero>
<fpage>659</fpage>
<lpage>667</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0300-90412017001000659&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0300-90412017001000659&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0300-90412017001000659&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  OBJETIVO: conocer la tasa de embarazo clínico en el primer ciclo de inseminación intrauterina en pacientes estimuladas con gonadotropinas, según la cantidad de folículos maduros desarrollados y la edad, así como la influencia de los antagonistas de GnRH en su desarrollo y en la tasa de embarazo.  MATERIALES Y MÉTODOS: estudio analítico y retrospectivo efectuado para evaluar el primer ciclo de inseminación intrauterina en las pacientes atendidas en el Instituto Nacional de Perinatología Isidro Espinosa de los Reyes entre enero de 2015 y diciembre de 2016, con diferentes protocolos de gonadotropinas. La muestra se dividió en grupos: menores de 35 y mayores de esta edad e indicación o no de antagonista de GnRH.  RESULTADOS: se estudiaron 171 pacientes; 60.4% menores de 35 años (grupo 1) y 65.1% mayores de esta edad (grupo 2) que desarrollaron de 2 a 4 folículos maduros. La tasa de embarazo clínico en el grupo 1 fue de 27.7 y 28.5% en el grupo 2. Con 1 (54.5%) y 4 (57.4%) folículos maduros desarrollados y relación proporcional entre el número de éstos y la tasa de embarazo. La tasa de embarazo en curso fue de 19.8% en el grupo 1 y 13.3% en el grupo 2. El uso de antagonista de GnRH no parece relacionarse con mejores tasas de embarazo en ciclos con más de un folículo maduro.  CONCLUSIONES: se encontró asociación entre la cantidad de folículos maduros desarrollados y la tasa de embarazo clínico y en curso, pero sin diferencia significativa al momento de asociar estas variables con la edad o con el uso de un antagonista de GnRH. Sin embargo, sí se encontró una tendencia clara de mejores tasas de embarazo en las pacientes tratadas con antagonista de GnRH.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  OBJECTIVE: To determine the clinical pregnancy rate in the first cycle of intrauterine insemination with gonadotropin stimulation in relation to number of mature follicles and age and the use of GnRH antagonist on its development.  MATERIALS AND METHODS:  Analytic, retrospective study, we evaluated the first IUI cycle in 171 women stimulated with different protocols of ovarian stimulation in a period of two years. The patients were divided into two groups: &lt;35 and &#8805;35 years old and the use of GnRH antagonist.  RESULTS: 60.4 and 65.1% of patients &lt;35 and &#8805;35 years old respectively, developed 2 to 4 mature follicles; the clinical pregnancy rate &lt;35 and &#8805;35 years old was 27.7 y 28.5% and 54.5 and 57.4% with 1 and 4 mature follicles developed, we found a proportional relation between mature follicles and pregnancy rates. The ongoing pregnancy rates was 19.8 y 13.3% in &lt;35 y &#8805;35 years respectively. The use of antGnRH does not appear to be related to better pregnancy rates in cycles with more than one mature follicle.  CONCLUSIONS: we found a proportional relation between mature follicles and pregnancy rates. The use of antGnRH does not appear to be related to better pregnancy rates in cycles with more than one mature follicle. The target in ovarian stimulation and IUI must be the development of 2 or 3 matures follicles.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[inseminación]]></kwd>
<kwd lng="es"><![CDATA[antagonista]]></kwd>
<kwd lng="es"><![CDATA[GnRH]]></kwd>
<kwd lng="es"><![CDATA[gonadotropinas]]></kwd>
<kwd lng="es"><![CDATA[inducción de la ovulación]]></kwd>
<kwd lng="en"><![CDATA[Insemination]]></kwd>
<kwd lng="en"><![CDATA[Antagonist]]></kwd>
<kwd lng="en"><![CDATA[GnRH]]></kwd>
<kwd lng="en"><![CDATA[Gonadotropins]]></kwd>
<kwd lng="en"><![CDATA[Ovulation induction]]></kwd>
</kwd-group>
</article-meta>
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