<?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>2007-1124</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias pecuarias]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. de cienc. pecuarias]]></abbrev-journal-title>
<issn>2007-1124</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-11242022000200549</article-id>
<article-id pub-id-type="doi">10.22319/rmcp.v13i2.5819</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Induced lactation in Holstein cattle with no exogenous progesterone supplementation and with reduced doses of estradiol benzoate]]></article-title>
<article-title xml:lang="es"><![CDATA[Inducción de la lactancia en ganado Holstein con dosis reducidas de benzoato de estradiol y sin suplementar progesterona exógena]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González-Maldonado]]></surname>
<given-names><![CDATA[Juan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rangel-Santos]]></surname>
<given-names><![CDATA[Raymundo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez-Valverde]]></surname>
<given-names><![CDATA[Gustavo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gallegos-Sánchez]]></surname>
<given-names><![CDATA[Jaime]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Beunabad-Carrasco]]></surname>
<given-names><![CDATA[Lorenzo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Antillón Ruiz]]></surname>
<given-names><![CDATA[Javier]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma Chapingo Posgrado en Producción Animal ]]></institution>
<addr-line><![CDATA[ Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Colegio de Postgraduados Departamento de Estadística ]]></institution>
<addr-line><![CDATA[ Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Colegio de Postgraduados Departamento de Ganadería ]]></institution>
<addr-line><![CDATA[ Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Autónoma de Chihuahua Facultad de Zootecnia y Ecología ]]></institution>
<addr-line><![CDATA[ Chihuahua]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2022</year>
</pub-date>
<volume>13</volume>
<numero>2</numero>
<fpage>549</fpage>
<lpage>558</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11242022000200549&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11242022000200549&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11242022000200549&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Lactation induction in cattle is an alternative way to increase the life span of cows with reproductive and productive issues that would otherwise be culled. An alternative lactation induction protocol is proposed. This 21-d protocol takes advantage of endogenous progesterone production and uses low doses of estradiol to stimulate udder growth and function. Holstein cows (n= 5) and heifers (n= 4) were injected with 500 mg of somatotropin on days one, eight, fourteen, and twenty-one. Estradiol benzoate (3-10 mg d-1) was applied from day one to fourteen. Cloprostenol (500 µg) was administered to the animals am and pm on d 1, and from d 18 to 21, they were injected dexamethasone (5 mg d-1). The cows and heifers were milked for the first time on d 22. Exogenous progesterone was not supplemented, but lactation protocol began in the diestrus phase of the estrous cycle and GnRH was injected to induce formation of an accessory corpus luteum. Lactation induction was successful in all animals, milk production ranged from 18.3 to 25.5 kg d-1. In conclusion, endogenous progesterone production in combination with reduced doses of estradiol benzoate is sufficient to induce lactation in Holstein cattle.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La inducción de la lactancia en el ganado es una forma alternativa de aumentar la vida productiva de las vacas con problemas reproductivos y productivos que, de lo contrario, serían sacrificadas. Se propone un protocolo alternativo de inducción de la lactancia. En este protocolo de 21 días se aprovecha la producción de progesterona endógena y utiliza dosis bajas de estradiol para estimular el crecimiento y la función de la ubre. Se inyectaron 500 mg de somatotropina en los días uno, ocho, catorce y veintiuno a vacas (n= 5) y vaquillas (n= 4) Holstein. Se aplicó el benzoato de estradiol (3-10 mg día-1) desde el día uno hasta el día catorce. A los animales se les administró cloprostenol (500 µg) en la mañana y en la tarde del día 1, y del día 18 al 21 se les inyectó dexametasona (5 mg día-1). Se ordeñaron a las vacas y vaquillas por primera vez el día 22. No se administró progesterona exógena en ningún momento del experimento, pero el protocolo de lactancia comenzó en la fase diestro del ciclo de celo y se inyectó GnRH para inducir la formación de un cuerpo lúteo accesorio. La inducción de la lactancia fue exitosa en todos los animales y la producción de leche varió de 18.3 a 25.5 kg día-1. La producción endógena de progesterona en combinación con dosis reducidas de benzoato de estradiol es suficiente para inducir la lactancia en vacas Holstein.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Bovine]]></kwd>
<kwd lng="en"><![CDATA[Lifespan]]></kwd>
<kwd lng="en"><![CDATA[Hormones]]></kwd>
<kwd lng="en"><![CDATA[Milk]]></kwd>
<kwd lng="es"><![CDATA[Bovinos]]></kwd>
<kwd lng="es"><![CDATA[Esperanza de vida]]></kwd>
<kwd lng="es"><![CDATA[Hormonas]]></kwd>
<kwd lng="es"><![CDATA[Leche]]></kwd>
</kwd-group>
</article-meta>
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