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Revista Veterinaria Zacatecas 2006 - Universidad Autónoma de ...

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Reproducción <strong>de</strong> cerdos androgenizados<br />

retroalimentación negativa sobre el hipotálamo <strong>de</strong>l<br />

feto y como consecuencia menor liberación <strong>de</strong><br />

gonadotropinas en la hipófisis. La secreción <strong>de</strong><br />

hormona luteinizante y testosterona se realizan en<br />

forma paralela al crecimiento testicular en los<br />

cerdos antes y <strong>de</strong>spués <strong>de</strong>l nacimiento. 25 La<br />

implantación intracerebral directa <strong>de</strong> testosterona<br />

en el hipotálamo mediobasal o la amígdala inhibe<br />

la secreción hipofisiaria <strong>de</strong> hormona<br />

luteinizante, 26 y la hipofisectomía <strong>de</strong> cerdos<br />

inmaduros 27 y en los adultos 28 provoca la<br />

regresión <strong>de</strong> los testículos.<br />

LITERATURA CITADA<br />

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249

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