<?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>2007-9028</journal-id>
<journal-title><![CDATA[Ecosistemas y recursos agropecuarios]]></journal-title>
<abbrev-journal-title><![CDATA[Ecosistemas y recur. agropecuarios]]></abbrev-journal-title>
<issn>2007-9028</issn>
<publisher>
<publisher-name><![CDATA[Universidad Juárez Autónoma de Tabasco, Dirección de Investigación y Posgrado]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-90282019000300573</article-id>
<article-id pub-id-type="doi">10.19136/era.a6n18.2070</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Factores de riesgo asociados con placenta retenida en ganado lechero en el norte de México]]></article-title>
<article-title xml:lang="en"><![CDATA[Risk factors associated with retained placenta in dairy cattle in northern Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carrera-Chávez]]></surname>
<given-names><![CDATA[José María]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Marmolejo-Aldana]]></surname>
<given-names><![CDATA[Carla América]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Escárcega-Ávila]]></surname>
<given-names><![CDATA[Angélica María]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Itzá-Ortiz]]></surname>
<given-names><![CDATA[Mateo Fabián]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Orozco-Lucero]]></surname>
<given-names><![CDATA[Ernesto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez-Eguia]]></surname>
<given-names><![CDATA[Eduardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Quintero-Elisea]]></surname>
<given-names><![CDATA[Juan Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Quezada-Casasola]]></surname>
<given-names><![CDATA[Andrés]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Ciudad Juárez Instituto de Ciencias Biomédicas Departamento de Ciencias Veterinarias]]></institution>
<addr-line><![CDATA[Ciudad Juárez Chihuahua]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<volume>6</volume>
<numero>18</numero>
<fpage>573</fpage>
<lpage>579</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-90282019000300573&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-90282019000300573&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-90282019000300573&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: El objetivo fue determinar la asociación entre diferentes factores de riesgo para retención placentaria (RP) en el norte de México. Se utilizaron registros de 2 492 vacas Holstein de un establo comercial en Ciudad Juárez, Chihuahua, México. Las variables se analizaron mediante la prueba de ji-cuadrada (&#967;2) y se calcularon las razones de momios (RM) para determinar la asociación de los factores de riesgo con RP. La incidencia total de RP fue del 10.15%. Los factores de riesgo asociados con la RP fueron nacimiento gemelar y nacimiento prematuro, seguidos por mortinatos y distocia. La presencia de RP no aumentó el número de inseminaciones, pero disminuyó los días en leche en las vacas afectadas (p &lt; 0.05). En conclusión, los factores de riesgo de parto gemelar, parto prematuro, mortinatos, distocia y edad de la vaca afectan la incidencia de RP, mientras que temporada de parto no predispone a la presentación de esta alteración.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: The objective was to determine the association between different risk factors for placental retention (PR) in northern Mexico. Records of 2,492 Holstein cows from a commercial stable in Ciudad Juárez, Chihuahua, Mexico were used. Variables were analyzed using the chi-square test (&#967;2) and odds ratios (OR) were calculated to determine the association of risk factors with PR. The total incidence of PR was 10.15%. Risk factors associated with PR were twin calving and premature calving, followed by stillbirth and dystocia. The presence of PR did not increase the number of inseminations, but decreased days in milk in affected cows (p &lt; 0.05). In conclusion, risk factors of twin calving, premature calving, stillbirth, dystocia and cow age affect the incidence of PR, while calving season does not predispose the animal to the presentation of this alteration.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Factores asociados]]></kwd>
<kwd lng="es"><![CDATA[parámetros reproductivos]]></kwd>
<kwd lng="es"><![CDATA[placenta retenida]]></kwd>
<kwd lng="es"><![CDATA[trastornos reproductivos]]></kwd>
<kwd lng="es"><![CDATA[vacas lecheras]]></kwd>
<kwd lng="en"><![CDATA[Associated factors]]></kwd>
<kwd lng="en"><![CDATA[reproductive parameters]]></kwd>
<kwd lng="en"><![CDATA[retained placenta]]></kwd>
<kwd lng="en"><![CDATA[reproductive disorders]]></kwd>
<kwd lng="en"><![CDATA[dairy cows]]></kwd>
</kwd-group>
</article-meta>
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<volume>6</volume>
<page-range>53-9</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
