<?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>2311-2581</journal-id>
<journal-title><![CDATA[Journal of the Selva Andina Animal Science]]></journal-title>
<abbrev-journal-title><![CDATA[J.Selva Andina Anim. Sci.]]></abbrev-journal-title>
<issn>2311-2581</issn>
<publisher>
<publisher-name><![CDATA[Journal of the Selva Andina Animal Science.Fundación Selva Andina Research Society.Departamento de Enseñanza e Investigación en Bioquímica & Microbiología.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2311-25812021000200073</article-id>
<article-id pub-id-type="doi">10.36610/j.jsaas.2021.080200073</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Evaluación del protocolo corto y largo de sincronización de celo en borregas inseminadas con semen congelado]]></article-title>
<article-title xml:lang="en"><![CDATA[Evaluation of the short and long estrus synchronization protocol in inseminated sheep with frozen semen]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Manrique Quispe]]></surname>
<given-names><![CDATA[Yan Pierr]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez Guerra]]></surname>
<given-names><![CDATA[Uri Harold]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Málaga Apaza]]></surname>
<given-names><![CDATA[Julio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ayma Flores]]></surname>
<given-names><![CDATA[Wilbur Rubén]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cardenas Minaya]]></surname>
<given-names><![CDATA[Oscar Efrain]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez Durand]]></surname>
<given-names><![CDATA[Manuel Guido]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional del Altiplano Puno Facultad de Medicina Veterinaria y Zootecnia Laboratorio de Reproducción Animal]]></institution>
<addr-line><![CDATA[Puno ]]></addr-line>
<country>Peru</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional del Altiplano Puno Facultad de Medicina Veterinaria y Zootecnia Dirección de Post Grado]]></institution>
<addr-line><![CDATA[Puno ]]></addr-line>
<country>Peru</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional del Altiplano Puno Facultad de Medicina Veterinaria y Zootecnia Centro Experimental Carolina]]></institution>
<addr-line><![CDATA[Puno ]]></addr-line>
<country>Peru</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Instituto Nacional de Innovación Agraria Laboratorio de Biotecnología Reproductiva ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Perú</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<volume>8</volume>
<numero>2</numero>
<fpage>73</fpage>
<lpage>81</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_arttext&amp;pid=S2311-25812021000200073&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_abstract&amp;pid=S2311-25812021000200073&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_pdf&amp;pid=S2311-25812021000200073&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El objetivo del trabajo fue evaluar el efecto de los protocolos corto (5 días) y largo (9 días) de SC en borregas inseminadas con semen congelado sobre el diámetro del cuerno uterino y tasa de preñez. El experimento se realizó en el Centro Experimental Carolina, perteneciente a la Universidad Nacional del Altiplano, y se utilizó 40 ovejas entre Corriedale y Criollas, en grupos de 20 para cada tratamiento, que fueron sincronizadas con esponjas intravaginales a base de Acetato de Medroxiprogesterona, durante 9 días (protocolo largo) y 5 días (protocolo corto) y al momento del retiro de la esponja se aplicó 350 UI de eCG. Para medir el diámetro del cuerno uterino se realizó la ecografía a las 36 h post retiro de la esponja y a las 56 h la inseminación cervical con semen descongelado y una posterior ecografía a los 35 días para confirmar la gestación. Los datos cuantitativos fueron analizados mediante la prueba estadística de &#8220;t&#8221; para diámetro de cuerno uterino y Ji cuadro para tasa de gestación. Los resultados para el diámetro de cuerno uterino fueron de 11.11±1.52 y 12.12±2.12 mm para el protocolo de sincronización corto y largo, respectivamente. Respecto a la tasa de preñez se obtuvo 21.05 % y 25 %, para el protocolo de sincronización corto y largo, respectivamente. Por lo que podemos concluir que el tratamiento largo de progesterona, tuvo mejores resultados al tratamiento corto tanto en el diámetro de cuerno uterino y tasa de gestación, pero no fue significativo esta diferencia (p&gt;0.05).]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The objective of the study was to evaluate the effect of short (5 days) and long (9 days) SC protocols in ewes inseminated with frozen semen on the diameter of the uterine horn and pregnancy rate. The experiment was carried out at the Carolina Experimental Center, belonging to the National University of the Altiplano, and 40 ewes between Corriedale and Criollas were used; in groups of 20 for each treatment, which were synchronized with intravaginal sponges based on Medroxyprogesterone acetate, for 9 days (long protocol) and 5 days (short protocol) and at the time of sponge removal, 350 IU of eCG were applied. To measure the diameter of the uterine horn, ultrasonography was performed at 36 h post sponge removal and at 56 h after cervical insemination with thawed semen and a subsequent ultrasonography at 35 days to confirm gestation. Quantitative data were analyzed using the statistical t-test for uterine horn diameter and Chi-square for gestation rate. The results for uterine horn diameter were 11.11±1.52 and 12.12±2.12 mm for the short and long synchronization protocol, respectively. Regarding the pregnancy rate, 21.05 % and 25 % were obtained for the short and long synchronization protocol, respectively. Therefore, we can conclude that the long progesterone treatment had better results than the short treatment both in uterine diameter and pregnancy rate, but this difference was not significant (p&gt;0.05).]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Estro]]></kwd>
<kwd lng="es"><![CDATA[diámetro uterino]]></kwd>
<kwd lng="es"><![CDATA[fertilidad]]></kwd>
<kwd lng="es"><![CDATA[ovino]]></kwd>
<kwd lng="es"><![CDATA[preñez]]></kwd>
<kwd lng="es"><![CDATA[semen descongelado]]></kwd>
<kwd lng="en"><![CDATA[Estrus]]></kwd>
<kwd lng="en"><![CDATA[fertility]]></kwd>
<kwd lng="en"><![CDATA[ovine]]></kwd>
<kwd lng="en"><![CDATA[pregnancy]]></kwd>
<kwd lng="en"><![CDATA[thawed semen]]></kwd>
<kwd lng="en"><![CDATA[uterine diameter.]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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