Insemination timing influences reproductive performance rather than eCG (Equine Chorionic Gonadotropin) or synchronisation protocol in Murciano-Granadina does

Counteracting goat reproduction seasonality and ensuring acceptable fertility rates are critical points of the success of selection of synchronisation protocols. The present study aims to investigate the factors that affect the performance of specific protocols to increase the probability of pregnan...

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Published in:Italian journal of animal science 2024-12, Vol.23 (1), p.348-361
Main Authors: Peláez Caro, María Pía, Arando Arbulu, Ander, León Jurado, José Manuel, Delgado Bermejo, Juan Vicente, Fernández Álvarez, Javier, Navas González, Francisco Javier
Format: Article
Language:English
Subjects:
Artificial insemination
Chorionic gonadotropin
does
equine chorionic gonadotropin
farms
Fertility
goats
Gonadotropins
insemination
Murcia-Granada
murciano-granadina breed
Pituitary (anterior)
Pregnancy
probability
regression analysis
reproductive performance
Semen
synchronization protocol
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Summary:Counteracting goat reproduction seasonality and ensuring acceptable fertility rates are critical points of the success of selection of synchronisation protocols. The present study aims to investigate the factors that affect the performance of specific protocols to increase the probability of pregnancy results in the Murciano-Granadina breed within the official breeding program and way in which such factors interrelate. This study evaluated 11,008 artificial inseminations carried out between 2010 and 2013, using three different synchronisation protocols and eCG combinations. A categorical regression model (CATREG) was used to determine the impact of farm, doe age, birth number, kidding type, kid number, number of alive and dead born kids, synchronisation protocol, kidding month, type of semen, kidding season, eCG concentration, and their inter-actions. Results indicated that all variables, except for the number of alive and dead kids and semen type, significantly (p 
ISSN:1828-051X
1594-4077
1828-051X
DOI:10.1080/1828051X.2024.2312161