High fertility using artificial insemination during deep anoestrus after induction and synchronisation of ovulatory activity by the “male effect” in lactating goats subjected to treatment with artificial long days and progestagens

Pellicer-Rubio, Maria-Teresa; Leboeuf, Bernard; Bernelas, Daniel; Forgerit, Yvonnick; Pougnard, Jean Louis; Bonné, J.L.; Senty, Estelle; Breton, Sylvain; Brun, F.; Chemineau, Philippe

doi:10.1016/j.anireprosci.2007.11.026

Cited by 26 publications

(15 citation statements)

References 18 publications

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“…The characteristics of the preovulatory LH surge observed in our present study coincide with those previously described by others and occurred approximately 36 hours after the introduction of the non-sedated males [7,25,28]. In accordance with previous studies [29,30], our results further indicate that the female goats exposed to the nonsedated males ovulated approximately 20 to 24 hours after the preovulatory LH surge. In fact, 95% (19/20) of the female goats exposed to the non-sedated males ovulated during the first 6 days after introduction to the males; by contrast, none of the females exposed to the sedated males ovulated.…”

Section: Discussionsupporting

confidence: 94%

Importance of intense male sexual behavior for inducing the preovulatory LH surge and ovulation in seasonally anovulatory female goats

et al. 2014

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Section: Discussionsupporting

confidence: 94%

Importance of intense male sexual behavior for inducing the preovulatory LH surge and ovulation in seasonally anovulatory female goats

et al. 2014

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“…1996). This type of treatment could be satisfactorily associated with AI on fixed‐time basis with fertility results equivalent to ‘classical’ hormonal treatment with FGA sponge and eCG (Pellicer‐Rubio et al. 2007, 2008).…”

Section: Using Artificial Photoperiodic Treatments To Control Seasonamentioning

confidence: 99%

Seasonality of Reproduction in Mammals: Intimate Regulatory Mechanisms and Practical Implications

Chemineau

Guillaume

Migaud

et al. 2008

Reprod Domestic Animals

134

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Farm mammals generally express seasonal variations in their production traits, thus inducing changing availability of fresh derived animal products (meat, milk and cheese) or performances (horses). This is due to a more or less marked seasonal birth distribution in sheep and goats, in horses but not cattle. Birth peak occurs at the end of winter-early spring, the most favourable period for the progeny to survive. Most species show seasonal variations in their ovulation frequency (presence or absence of ovulation), spermatogenic activity (from moderate decrease to complete absence of sperm production), gamete quality (variations in fertilization rates and embryo survival), and also sexual behaviour. The intimate mechanism involved is a complex combination of endogenous circannual rhythm driven and synchronized by light and melatonin. Profound and long-term neuroendocrine changes involving different neuromediator systems were described to play a role in these processes. In most species artificial photoperiodic treatments consisting of extra-light during natural short days (in sheep and goats and mares) or melatonin during long days (in sheep and goats) are extensively used to either adjust the breeding season to animal producer needs and/or to completely overcome seasonal variations of sperm production in artificial insemination centres. Pure light treatments (without melatonin), especially when applied in open barns, could be considered as non-invasive ones which fully respect animal welfare. Genetic selection could be one of the future ways to decrease seasonality in sheep and goats.

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“…Artificial insemination protocols including one or two inseminations over a 24‐h period determined by the occurrence of oestrus or by the introduction of the buck have been validated. In the middle of seasonal anoestrus (May), a high level of fertility (71–78% of kidding) was obtained using frozen semen on goats subjected to treatment with artificial long days and progestagen followed by one AI 52 h after introduction of the buck equipped with an apron (Pellicer‐Rubio et al. 2008).…”

Section: Production and Storage Of Semen For Artificial Inseminationmentioning

confidence: 99%

Management of Goat Reproduction and Insemination for Genetic Improvement in France

Leboeuf¹,

Delgadillo

Manfredi³

et al. 2008

Reprod Domestic Animals

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Reproductive seasonality observed in all breeds of goats originating from temperate latitudes and in some breeds from subtropical latitudes can now be controlled by artificial changes in photoperiod. Short days stimulate sexual activity, while long days inhibit it. This knowledge has allowed the development of photoperiodic treatments to control sexual activity in goats, for both the buck and doe. In the French intensive milk production system, goat AI plays an important role to control reproduction and, in conjunction with progeny testing, to improve milk production. Most dairy goats are inseminated out of the breeding season with deep frozen semen, after induction of oestrus and ovulation by hormonal treatments. This protocol provides a kidding rate of approximately 65%. New breeding strategies have been developed, based on the buck effect associated with AI, to reduce the use of hormones. With the development of insemination with frozen semen, a classical selection programme was set up, including planned mating, progeny testing and the diffusion of proved sires by inseminations in herds. Functional traits have become important for efficient breeding schemes in the dairy goat industries. Based on knowledge gained over the past decade, the emphasis in selective breeding has been placed on functional traits related to udder morphology and health. New windows have been opened based on new molecular tools, allowing the detection and mapping of genes of economic importance.

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High fertility using artificial insemination during deep anoestrus after induction and synchronisation of ovulatory activity by the “male effect” in lactating goats subjected to treatment with artificial long days and progestagens

Cited by 26 publications

References 18 publications

Importance of intense male sexual behavior for inducing the preovulatory LH surge and ovulation in seasonally anovulatory female goats

Importance of intense male sexual behavior for inducing the preovulatory LH surge and ovulation in seasonally anovulatory female goats

Seasonality of Reproduction in Mammals: Intimate Regulatory Mechanisms and Practical Implications

Management of Goat Reproduction and Insemination for Genetic Improvement in France

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