Artificial insemination of dairy goats in France

Leboeuf, B.; Manfredi, Eduardo; Boue, P.; Piacére, Agnès; Brice, G.; Baril, Gérard; Broqua, C.; Humblot, P.; Terqui, M.

doi:10.1016/s0301-6226(98)00140-7

Cited by 58 publications

(51 citation statements)

References 12 publications

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“…Nevertheless, the number of does inseminated has progressively increased during the last two decades, encouraged by sanitary reasons and by the introduction of genetic selection in breeding programmes (Ponsart et al, 2004;Verberckmoes et al, 2004). Both multiparous and nulliparous goats are used in AI programmes but fertility in nulliparous does is currently limited, being irregular and low compared with multiparous females (Leboeuf et al, 1998), often leading breeders to prefer natural mating for first conceptions. A recent study in nulliparous dairy heifers emphasized that most variations in conception rates was attributable to oestrus detection, pelvic size and breeding season (Donovan et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Short-duration insemination with frozen semen increases fertility rate in nulliparous dairy goats

Houdeau¹,

Furstoss²,

Forgerit³

et al. 2008

Animal

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Standard artificial insemination (AI) using a speculum in dairy goats does not result in acceptable fertility rates in nulliparous does. An explanation might be the difficulties to pass the cervical canal in nulliparous females with the insemination gun, increasing the time needed for semen deposition. Nulliparous Alpine dairy goats were used to evaluate whether time interval from insertion to withdrawal of the speculum is a factor influencing pregnancy rates to first AI with frozenthawed semen. Oestrus was synchronized using fluorogestone acetate intravaginal sponges (FGA, 40 mg) for 11 days, associated with 50 mg i.m. of cloprostenol and 250 IU i.m. eCG 48 6 2 h before sponge removal. In the first experiment (n 5 52; 3 herds), the average duration of the AI procedure was 42 6 10 s, with a median of 39 s. AI performed in less than 39 s resulted in higher pregnancy rates (75%, n 5 28) than AI lasting for more than 39 s (46%, n 5 24). In the second experiment, does (n 5 325; 5 herds) were randomly assigned into two treatment groups according to a short (20 s) or long (60 s) AI procedure. We showed that the duration of AI affected fertility after a first insemination, and that pregnancy rate was significantly improved using a shortduration AI (61.2%; n 5 169) compared with a long-duration AI (44.2%; n 5 156). We have previously shown in the ewe that genital stimulation during AI enhanced uterine motility. Other authors reported a negative correlation between increased uterine motility at the time of AI and fertility rates in small ruminants. The results of this study suggest that rapid semen deposition may limit the reflex activation of uterine contractions provoked by the speculum and the movement of the insemination gun, and thus ameliorates reproductive performance to first AI in nulliparous goats.Keywords: goat, nulliparous, artificial insemination, fertility, uterus IntroductionArtificial insemination (AI) in dairy goats is less commonly used than in other domestic animals. Nevertheless, the number of does inseminated has progressively increased during the last two decades, encouraged by sanitary reasons and by the introduction of genetic selection in breeding programmes (Ponsart et al., 2004;Verberckmoes et al., 2004). Both multiparous and nulliparous goats are used in AI programmes but fertility in nulliparous does is currently limited, being irregular and low compared with multiparous females (Leboeuf et al., 1998), often leading breeders to prefer natural mating for first conceptions. A recent study in nulliparous dairy heifers emphasized that most variations in conception rates was attributable to oestrus detection, pelvic size and breeding season (Donovan et al., 2003). The farm, the inseminator and semen deposition site also contributed to variations of fertility in ruminants (Ron et al., 1984;Donovan et al., 2004;Verberckmoes et al., 2004;Paulenz et al., 2005). In goats, a recent report by Salvador et al. (2005) clearly indicated that the depth of semen deposition is a determining factor for pregnancy...

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Section: Introductionmentioning

confidence: 99%

Short-duration insemination with frozen semen increases fertility rate in nulliparous dairy goats

Houdeau¹,

Furstoss²,

Forgerit³

et al. 2008

Animal

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“…Both progesterone and its analogues have an inhibitory effect in the release of luteinizing hormone (LH) from the anterior pituitary so that the endocrine events that influence the maturation of the ovarian preovulatory follicles and their later ovulation are suppressed. Hence, following withdrawal of progesterone, oestrus and ovulation occur at a predictable period of time (Bretzlaff, 1997;Leboeuf et al, 1998). Worldwide, the most common route of application of progestagens in goats is intravaginal (Bretzlaff, 1997).…”

Section: Introductionmentioning

confidence: 99%

“…Pregnant mare serum gonadotrophin (PMSG) administration with follicle stimulating hormone (FSH) and (LH) activity 48 h before or at progestagen withdrawal have been shown to stimulate follicular growth in both anoestrous and cycling goats and affect the time of ovulation (Bretzlaff, 1997;Leboeuf et al, 1998). Pregnant mare serum gonadotrophin is generally administered at the time of progestagens removal during the breeding season (Motlomelo et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

“…During the non-breeding season, PMSG is administered 48 h prior to progestagen removal (Baril et al, 1993). At the same time the use of the synthetic prostaglandin F 2α , analogue, cloptostenol, causes luteolysis in does having a functional corpus luteum at the end of the treatment (Baril et al, 1993;Bretzlaff, 1997;Leboeuf et al, 1998;Motlomelo et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

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Comparison of fluorgestone and medroxyprogesterone intravaginal sponges for oestrus synchronization in Saanen does during the transition period

Doğan

Nur²,

Günay³

et al. 2004

SA J. An. Sci.

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________________________________________________________________________________ AbstractThe efficiency of medroxyprogesterone acetate (MAP) and fluorogestone acetate (FGA) sponges for synchronizing oestrus in lactating Saanen goats was investigated during the transition from non-breeding to natural breeding season. Does were treated for 11 days with 60 mg MAP (n=19) or 40 mg FGA (n=24) sponges. All does received intramuscular injections of 750 IU pregnant mare serum gonadotrophin (PMSG) and 125 µg cloprostenol (PGF 2 α) 48 h prior to sponge removal. Cervical artificial insemination (AI) with fresh diluted semen was performed at a fixed time (36 and 48 h) followed progestagen withdrawal. The two progestagen treatments showed no significant difference in oestrous response (100% both for MAP and FGA groups), time to the onset (15.8±09 and 15.0±06 h for the MAP and FGA groups, respectively), duration (30.5±1.9 and 34.0±1.4 h for MAP and FGA, respectively) and cessation (42.32±1.6 and 43.25±1.3 h for MAP and FGA, respectively) of the induced oestrus period. No significant difference was observed with respect to pregnancy rates determined at the 53 rd day after AI (52.6 and 50.0% for MAP and FGA, respectively). These dates indicate that the use of MAP and FGA intravaginal progestagen treatments are equally efficient in synchronizing oestrus in lactating goats during the transition from the non-breeding to the natural breeding season. ________________________________________________________________________________

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“…In order to satisfy year-round cheese market demands, treatments to control the timing of reproduction are needed. This control is mainly based on hormonal treatment (Leboeuf et al, 1998) and, with less efficiency, on light treatment and male effect (Fatet et al, 2009). Goat AI centres use only frozen semen in France, mainly as a mean to dissociate the time of production from the time of use.…”

Section: Introductionmentioning

confidence: 99%

Genetic and non-genetic factors related to the success of artificial insemination in dairy goats

Furstoss¹,

David²,

Fatet³

et al. 2015

Animal

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The objective of this study was to evaluate genetic and non-genetic factors influencing artificial insemination (AI) success in French dairy goats. Data analysis, on a total of 584 676 and 386 517 AI records for Alpine and Saanen breed, respectively, collected from 1992 to 2009, was conducted separately on each breed. We used a linear simple repeatability animal model which combined male and female random effect and environmental fixed effects. The most important environmental factor identified was the period within year effect due to the European heat wave of 2003. The estimated values of the annual fertility exhibited a negative trend of 1% loss of AI success per 10 years for Alpine breed only. The range of variation for the flock × within years random effect was 70% and 65% for Alpine and Saanen breeds. The negative effect on AI success of antibody production after repetitive hormonal treatment was confirmed. We observed an important positive relationship between fertility and protein yield expressed as quartile within flock × years of protein 250-day yield for female with lactation number over 1, while this trend was negative for primiparous females. We detected a negative effect of the duration of conservation of semen with a difference of about 4% of AI success between extreme values (2 to 8 + or 9 + years). Heritability estimates for male fertility were 0.0037 and 0.0043 for Alpine and Saanen breed respectively, while estimates for female fertility was 0.040 and 0.049. Repeatability estimates for males were 0.008 and 0.010 for Alpine and Saanen, respectively, and 0.097 and 0.102 for females. With such low values of heritability, selection can hardly affect fertility.

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Artificial insemination of dairy goats in France

Cited by 58 publications

References 12 publications

Short-duration insemination with frozen semen increases fertility rate in nulliparous dairy goats

Short-duration insemination with frozen semen increases fertility rate in nulliparous dairy goats

Comparison of fluorgestone and medroxyprogesterone intravaginal sponges for oestrus synchronization in Saanen does during the transition period

Genetic and non-genetic factors related to the success of artificial insemination in dairy goats

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