La bioestimulación sexual periconcepcional induce concepción anticipada, pero no mejora la fertilidad ni la eficiencia reproductiva en cabras

Juan M. Vázquez-García; Cesar A. Meza-Herrera; Venancio Cuevas-Reyes; Luisa E.S. Hernández-Arteaga; Jaime M. Cavazos-Galindo; Cesar Rosales Nieto

doi:10.18633/biotecnia.v27.2660

Authors

Juan M. Vázquez-García Facultad de Agronomía y Veterinaria. Universidad Autónoma San Luis Potosí, San Luis Potosí 78321, México.
Cesar A. Meza-Herrera Unidad Regional Universitaria de Zonas Áridas, Universidad Autónoma Chapingo, 35230, México. https://orcid.org/0000-0003-0289-2009
Venancio Cuevas-Reyes Campo Experimental Valle de México. Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias, Texcoco 56250, CDMX, México.
Luisa E.S. Hernández-Arteaga Facultad de Agronomía y Veterinaria. Universidad Autónoma San Luis Potosí, San Luis Potosí 78321, México.
Jaime M. Cavazos-Galindo Centro de Fomento Ganadero Vallecillo. Universidad Autónoma de Nuevo León, Nuevo León 65415, México.
Cesar Rosales Nieto Department of Agricultural Sciences. Texas State University, San Marcos, Tx 78666, USA. https://orcid.org/0000-0002-3414-338X

DOI:

https://doi.org/10.18633/biotecnia.v27.2660

Keywords:

Experienced, young, male effect, Alpine, Saanen.

Abstract

The male effect induces reproductive activity in female goats; however, it is not known whether it accelerates conception time and increases reproductive efficiency. In a retrospective analysis (2019-2021), 415 reproductive records of female goats (Saanen-Alpine) with (n=314;H-CON) or without (n=101;H-SIN) sexual experience were analyzed to determine whether periconceptional sexual biostimulation promotes earlier conception after the introduction of fertile males, increases the proportion of pregnant females in the first reproductive cycle, and increases reproductive efficiency. Prior to breeding, females were (n=292;H-EM) or not (n=123;H-NEM) stimulated with vasectomized males for 21 days and subsequently bred with fertile males in natural mating for 42 days. H-NEM and H-SIN (P<0.001) became pregnant more quickly (10-days) than H-CON (13-days) or H-EM (16-days). A high proportion of H-NEM (95%) or H-EM (72%) anticipated conception to their first reproductive cycle (P<0.001). Weight at the beginning of breeding or experience did not influence the conception cycle (P>0.05). Fertility rate was influenced by sexual experience (H-CON:96% vs H-SIN:53%) and weight at the beginning of breeding (P<0.001), but not by biostimulation (P>0.05). Reproductive rate was not influenced by biostimulation (H-EM:130% vs H-NEM:157%; P<0.05), sexual experience (H-CON:157% vs H-SIN:79%), and weight at the start of breeding (P<0.001). It is concluded that sexual experience and heavier females at the time of breeding were more fertile and prolific. Periconceptional sexual biostimulation promotes earlier conception.

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