<?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>S0300-90412018001000640</article-id>
<article-id pub-id-type="doi">10.24245/gom.v86i10.2145</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Descripción de la variación estacional en la mortalidad materna de México y el estado de Yucatán 2002-2016]]></article-title>
<article-title xml:lang="en"><![CDATA[Description of seasonal variation in maternal mortality in Mexico and the state of Yucatan between 2002 and 2016]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aguilar-Vargas]]></surname>
<given-names><![CDATA[Esteban]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Azcorra]]></surname>
<given-names><![CDATA[Hugo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Novelo-Pérez]]></surname>
<given-names><![CDATA[José Patricio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gómez-Carro]]></surname>
<given-names><![CDATA[Salvador]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Méndez-Domínguez]]></surname>
<given-names><![CDATA[Nina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Marista de Mérida  ]]></institution>
<addr-line><![CDATA[ Yucatán]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Politécnico Nacional Departamento de Ecología Humana, Centro de Investigación y Estudios Avanzados ]]></institution>
<addr-line><![CDATA[Mérida Yucatán]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Hospital General Agustín O´Horán Unidad de Vigilancia Epidemiológica Hospitalaria ]]></institution>
<addr-line><![CDATA[Mérida Yucatán]]></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>10</numero>
<fpage>640</fpage>
<lpage>649</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0300-90412018001000640&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0300-90412018001000640&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0300-90412018001000640&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Objetivo:  Describir la distribución bimestral y anual de los casos de mortalidad materna en la República Mexicana y en el estado de Yucatán.  Materiales y métodos:  Estudio epidemiológico, observacional, transversal y retrospectivo que incluyó todos los registros de mortalidad materna directa asentados en las bases de datos de la Secretaría de Salud, de 2002 a 2016. La distribución de la razón de muerte materna esperada-observada se graficó por bimestres. Los análisis estadísticos se efectuaron con el programa Stata 14.  Resultados:  El registro de nacimientos anuales entre 2002 y 2016 en México fue, en promedio, de 2,549,398 con una tasa de natalidad bimestral promedio, en el estado de Yucatán, de 3.02 ± 0.32, con valores máximos en los meses de septiembre y octubre. La media anual de mortalidad materna fue de 1123 casos. El total de casos nacionales de mortalidad materna directa fue de 17,088 y de 269 en el estado de Yucatán (1.57%). En el análisis de distribución bimestral de los casos de mortalidad materna se observó una frecuencia uniforme (0.94-1.06) a nivel nacional y una distribución unimodal en el bimestre septiembre-octubre (0.76-1.42) en Yucatán. El riesgo relativo de mortalidad materna en el estado de Yucatán fue significativamente mayor en septiembre y octubre (RR = 0.57- IC95% 0.73:1.00; p &lt; 0.05) periodo en el que ocurren casi un cuarto de los casos de mortalidad de todo el año.  Conclusiones:  La distribución estacional de la mortalidad materna nacional muestra mínimas variaciones bimestrales, pero en el estado de Yucatán se registran más casos entre septiembre y octubre, que a su vez coincide con la distribución de nacimientos en la entidad.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Objective:  To describe the annual bimonthly distribution of cases of maternal mortality at the national and Yucatan state levels.  Materials and methods:  Retrospective cross-sectional study, which included all direct maternal mortality registries with ICD-10 letter "O" registered in the open access databases of the Mexican Ministry of Health, between 2002-2016. The distribution of expected/observed MM ratio was plotted by bimonthly. Statistical analyses were performed using Stata 14 statistical program.  Results:  In Mexico, an average of 2,549,398 births were recorded between 2002 and 2016, with an average bimonthly birth rate in the state of Yucatan of 3.02 ± 0.32, with maximum values in September and October. Throughout the country, an average annual maternal mortality rate of 1123 cases was recorded between 2002 and 2016. The total number of cases of direct maternal mortality was 17,088 at the national level and 269 in the state of Yucatan (1.57%). In the analysis of bimonthly distribution of cases of maternal mortality, a uniform bimonthly frequency (0.94-1.06) was observed at the national level, while a unimodal distribution was observed in the September-October bimonthly (0.76-1.42) for the state of Yucatan. The relative risk of maternal mortality in the state of Yucatan is significantly higher in September-October bimonthly (RR =0.57- CI95% 0.73:1.00; p &lt; 0.05), period in which almost a quarter of the mortality cases occurred.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Mortalidad materna]]></kwd>
<kwd lng="es"><![CDATA[México]]></kwd>
<kwd lng="es"><![CDATA[tasa de nacimientos]]></kwd>
<kwd lng="es"><![CDATA[variación estacional]]></kwd>
<kwd lng="en"><![CDATA[Maternal mortality]]></kwd>
<kwd lng="en"><![CDATA[México]]></kwd>
<kwd lng="en"><![CDATA[Birth rate]]></kwd>
<kwd lng="en"><![CDATA[Seasonal distribution]]></kwd>
</kwd-group>
</article-meta>
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