<?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>0253-570X</journal-id>
<journal-title><![CDATA[Revista de Salud Animal]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Salud Anim.]]></abbrev-journal-title>
<issn>0253-570X</issn>
<publisher>
<publisher-name><![CDATA[Centro Nacional de Sanidad Agropecuaria]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0253-570X2018000300005</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Principales alteraciones morfológicas en ovocitos de ovino madurados in vitro]]></article-title>
<article-title xml:lang="en"><![CDATA[Main morphological alterations in ovine oocytes matured in vitro]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Martínez]]></surname>
<given-names><![CDATA[Sarahí]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Navarro-Maldonado]]></surname>
<given-names><![CDATA[María del Carmen]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ambríz-García]]></surname>
<given-names><![CDATA[Demetrio Alonso]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vázquez-Avendaño]]></surname>
<given-names><![CDATA[José Roberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Pichardo]]></surname>
<given-names><![CDATA[José Ernesto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma Metropolitana  Unidad Iztapalapa]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma Metropolitana  Unidad Xochimilco]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<volume>40</volume>
<numero>3</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S0253-570X2018000300005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S0253-570X2018000300005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S0253-570X2018000300005&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El ovocito es indispensable para el desarrollo embrionario de un organismo. Actualmente, su calidad se evalúa considerando parámetros morfológicos que permiten identificar alteraciones que comprometen el desarrollo del embrión. Sin embargo, en ovocitos de ovino, hasta el momento, no se han reportado anormalidades morfológicas. El objetivo del presente trabajo fue determinar la frecuencia y el tipo de alteraciones morfológicas en ovocitos de borrega. Para ello se realizaron 10 colectas, de las que se obtuvieron 567 ovarios procedentes de hembras sacrificadas en rastro y, mediante aspiración folicular, se lograron 2 374 ovocitos; todos ellos fueron madurados in vitro. De acuerdo a los criterios de la Asociación para el Estudio de la Biología de la Reproducción (ASEBIR), 798 ovocitos (33,6 %) se clasificaron de morfología normal y 1 576 (66,4 %) presentaron diferentes alteraciones morfológicas, como citoplasma granuloso (32,6 %), citoplasma incompleto (21,1 %), espacio perivitelino aumentado (11,7 %), presencia de vacuolas (11,6 %), ovocitos degenerados (8,9 %), alteraciones de la zona pelúcida (7 %), exudados citoplasmáticos (4,7 %), dimorfismo del cuerpo polar (0,3 %) y alteraciones producidas por la técnica de manejo, como la ausencia de zona pelúcida (2,1 %). Se concluye que, dada la alta tasa de anormalidades morfológicas en los ovocitos de ovinos madurados in vitro, es importante su minuciosa selección para obtener mejores resultados en el desarrollo embrionario in vitro.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The oocyte is indispensable for the embryonic development of an organism. Its quality is currently evaluated considering the morphological parameters that allow identifying the alterations that compromise the development of the embryo. So far, no morphological abnormalities have been reported in sheep oocytes. The objective of this study was to determine the frequency and type of morphological alterations in them. For this, 10 collections were carried out, of which 567 ovaries were obtained from slaughtered females and 2 374 oocytes were obtained by follicular aspiration; all of them matured in vitro. According to the criteria of the Association for the Study of Reproductive Biology (ASEBIR), 798 oocytes (33.6 %) were classified as normal morphology and 1 576 (66.4 %) presented different morphological alterations, as granular cytoplasm (32.6 %), incomplete cytoplasm (21.1 %), increased perivitelline space (11.7 %), presence of vacuoles (11.6 %), degenerated oocytes (8.9 %), abnormalities of the pellucid zone ( 7 %), cytoplasm exudates (4.7 %), polar body dimorphism (0.3 %), and alterations produced by the management technique, like the absence of pellucid zone (2.1 %). It is concluded that, given the high rate of morphological abnormalities in the in vitro maturation of oocytes, their detailed selection is important to obtain better results in the in vitro embryonic development.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[alteraciones ovocitarias]]></kwd>
<kwd lng="es"><![CDATA[evaluación morfológica]]></kwd>
<kwd lng="es"><![CDATA[maduración in vitro]]></kwd>
<kwd lng="es"><![CDATA[ovino]]></kwd>
<kwd lng="en"><![CDATA[oocyte alterations]]></kwd>
<kwd lng="en"><![CDATA[morphological evaluation]]></kwd>
<kwd lng="en"><![CDATA[in vitro maturation]]></kwd>
<kwd lng="en"><![CDATA[ovine]]></kwd>
</kwd-group>
</article-meta>
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