<?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>S2448-61322018000300014</article-id>
<article-id pub-id-type="doi">10.21929/abavet2018.83.1</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Mare Reproductive Cycle: A Review]]></article-title>
<article-title xml:lang="es"><![CDATA[Revisión: El Ciclo Reproductivo de la Yegua]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cortés-Vidauri]]></surname>
<given-names><![CDATA[Zimri]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aréchiga-Flores]]></surname>
<given-names><![CDATA[Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rincón-Delgado]]></surname>
<given-names><![CDATA[Melba]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rochín-Berumen]]></surname>
<given-names><![CDATA[Fabiola]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[López-Carlos]]></surname>
<given-names><![CDATA[Marco]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Flores-Flores]]></surname>
<given-names><![CDATA[Gilberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Autonomous University of Zacatecas  ]]></institution>
<addr-line><![CDATA[ Zacatecas]]></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>8</volume>
<numero>3</numero>
<fpage>14</fpage>
<lpage>41</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2448-61322018000300014&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2448-61322018000300014&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2448-61322018000300014&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The estrous cycle or interovulatory interval in the mare allows monitoring and selection of the most appropriate time for copulation or artificial insemination (AI). Estrous cycle is an interaction of hormones of the pineal gland, hypothalamus, pituitary, gonad and endometrium lasting 21 days. The pineal gland secretes melatonin during dark hours. In spring and summer, there is less melatonin secretion, and the hypothalamus secretes gonadotropin-releasing hormone (GnRH) to induce gonadotropins secretion: (FSH, follicle-stimulating hormone, and LH, luteinizing hormone) in the anterior pituitary and stimulates the ovulatory function. FSH promotes follicular growth and LH, follicular maturation and ovulation. Both stimulate the production of estradiol in the ovarian follicles. Estradiol causes estrus signs. After ovulation, the corpus luteum is formed and produces progesterone (P4) for gestation. P4 blocks the hypothalamus and reduces the secretion of GnRH, interrupting the estrous cycle. The hypothalamus produces oxytocin, which is stored in the neurohypophysis (posterior pituitary): and acts on the endometrium, stimulating prostaglandin F2&#945; secretion, to exert luteolysis and the start of a new estrous cycle. In autumn and winter, ovulatory activity is interrupted.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El ciclo estral, o intervalo interovulatorio en la yegua, permite monitorear y seleccionar el momento más adecuado para la cópula o la inseminación artificial (IA). El ciclo estral se debe a la interacción de hormonas de la glándula pineal, hipotálamo, hipófisis, gónada y endometrio, y dura 21 días. La glándula pineal segrega melatonina durante las horas de obscuridad. En primavera-verano, existe menor secreción de melatonina, y el hipotálamo secreta a la hormona liberadora de las gonadotropinas (GnRH) para inducir la secreción de gonadotropinas: (FSH, hormona folículo estimulante y LH, hormona luteinizante) en la adenohipófisis y estimular la función ovulatoria. La FSH promueve el crecimiento folicular y la LH, la maduración folicular y la ovulación. Ambas estimulan la producción de estradiol en los folículos ováricos. El estradiol causa las manifestaciones de estro. Después de la ovulación, se forma el cuerpo lúteo que produce progesterona (P4), para la gestación. La P4 bloquea al hipotálamo y reduce la secreción de GnRH, interrumpiendo el ciclo estral. El hipotálamo, produce oxitocina, que se almacena en neurohipófisis y actúa en endometrio, estimulando a la prostaglandina F2&#945;, para que ejerza luteolisis, y el inicio de un nuevo ciclo estral. En otoño e invierno se interrumpe la actividad ovulatoria.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[mares]]></kwd>
<kwd lng="en"><![CDATA[estrous cycle]]></kwd>
<kwd lng="en"><![CDATA[interovulatory period]]></kwd>
<kwd lng="en"><![CDATA[estrus]]></kwd>
<kwd lng="en"><![CDATA[ovulation]]></kwd>
<kwd lng="en"><![CDATA[seasonality]]></kwd>
<kwd lng="es"><![CDATA[yeguas]]></kwd>
<kwd lng="es"><![CDATA[ciclo estral]]></kwd>
<kwd lng="es"><![CDATA[intervalo interovulatorio]]></kwd>
<kwd lng="es"><![CDATA[estro]]></kwd>
<kwd lng="es"><![CDATA[ovulación]]></kwd>
<kwd lng="es"><![CDATA[estacionalidad]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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