<?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>2448-6132</journal-id>
<journal-title><![CDATA[Abanico veterinario]]></journal-title>
<abbrev-journal-title><![CDATA[Abanico vet]]></abbrev-journal-title>
<issn>2448-6132</issn>
<publisher>
<publisher-name><![CDATA[Sergio Martínez González]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2448-61322021000100123</article-id>
<article-id pub-id-type="doi">10.21929/abavet2021.34</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Protocolos cortos para la sincronización del estro en ovejas de pelo en Campeche, México]]></article-title>
<article-title xml:lang="en"><![CDATA[Short-term protocols for the estrus synchronization in hair sheep in Campeche, Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Balan-May]]></surname>
<given-names><![CDATA[Daniel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chiquini-Medina]]></surname>
<given-names><![CDATA[Ricardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Flota-Bañuelos]]></surname>
<given-names><![CDATA[Carolina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Marín]]></surname>
<given-names><![CDATA[Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rosales-Martínez]]></surname>
<given-names><![CDATA[Verónica]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fraire-Cordero]]></surname>
<given-names><![CDATA[Silvia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Colegio de Postgraduados  ]]></institution>
<addr-line><![CDATA[ Campeche]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Tecnológico de Chiná  ]]></institution>
<addr-line><![CDATA[ Campeche]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Colegio de Postgraduados  ]]></institution>
<addr-line><![CDATA[ Campeche]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad de Guanajuato Departamento de Veterinaria y Zootecnia ]]></institution>
<addr-line><![CDATA[Irapuato Guanajuato]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<volume>11</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2448-61322021000100123&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2448-61322021000100123&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2448-61322021000100123&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN La sincronización de estros es una estrategia para mejorar la eficiencia reproductiva del rebaño. El objetivo fue comparar diferentes tiempos de permanencia de un progestágeno intravaginal (CIDR®) con una dosis de PGF2&#945; en la sincronización al estro de ovejas de pelo. Se utilizaron 30 hembras de pelo, asignadas al azar a uno de tres tratamientos. T1: Progestágeno intravaginal (PI) por 5 días (PI5; n = 10), T2: PI por 7 días (PI7; n = 10) y T3: PI por 9 días (PI9; n = 10). Se observó la incidencia e inicio al estro, parición y prolificidad. El análisis de datos se realizó mediante el método de tiempos de vida, modelos de regresión logística y binomial negativa. La incidencia al estro no fue diferente (p &gt; 0.05) entre tratamientos (T1: 80.0, T2: 100.0 y T3:100.0 %). El inicio al estro fue menor (p &#8804; 0.0) para T1 (29.8 ± 2.9 h) en comparación con el resto de los tratamientos. No se observaron diferencias (p &gt; 0.05) para parición (T1: 70.0, T2: 90.0 y T3:90.0%) y prolificidad (T1: 1.4 ± 0.3, T2: 1.4 ± 0.3 y T3: 1.5 ± 0.3). Es factible utilizar protocolos cortos de sincronización basados en progestágenos intravaginales (CIDR®) con una dosis de PGF2&#945; y mantener la eficiencia reproductiva del rebaño.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Estrus synchronization is a strategy to improve the reproductive efficiency of the herd. The objective was to compare different dwells times of an intravaginal progestogen (CIDR®) with a dose of PGF2&#945; in the synchronization to estrus of hair sheeps. Thirty female hair sheeps were used, randomly assigned to one of three treatments. T1: intravaginal progestogen (PI) for 5 days (PI5; n=10), T2: PI for 7 days (PI7; n=10) and T3: PI for 9 days (PI9; n=10). The incidence and onset of estrus, parturition and prolificacy were observed. Data analysis was performed using the life time method, logistic regression models and negative binomial models. The incidence at estrus was not different (p&gt; 0.05) among treatments (T1: 80.0, T2: 100.0 and T3: 100.0%). Onset to estrus was lower (p &#8804; 0.0) for T1 (29.8 ± 2.9 h) compared to the rest of the treatments. No differences (p&gt; 0.05) were observed for parturition (T1: 70.0, T2: 90.0 and T3: 90.0%) and prolificacy (T1: 1.4 ± 0.3, T2: 1.4 ± 0.3 and T3: 1.5 ± 0.3). It is feasible to use short synchronization protocols based on intravaginal progestogens (CIDR®) with a dose of PGF2&#945; and maintain the reproductive efficiency of the herd.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[CIDR]]></kwd>
<kwd lng="es"><![CDATA[progesterona]]></kwd>
<kwd lng="es"><![CDATA[dispositivos]]></kwd>
<kwd lng="es"><![CDATA[fertilidad]]></kwd>
<kwd lng="es"><![CDATA[ovejas]]></kwd>
<kwd lng="en"><![CDATA[CIDR]]></kwd>
<kwd lng="en"><![CDATA[progesterone]]></kwd>
<kwd lng="en"><![CDATA[devices]]></kwd>
<kwd lng="en"><![CDATA[fertility]]></kwd>
<kwd lng="en"><![CDATA[ewes]]></kwd>
</kwd-group>
</article-meta>
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