Induction of estrus in non-lactating dairy goats with different estrous synchrony protocols

Fonseca, J. F. da; Bruschi, J. H.; Santos, Ingrid; Viana, J. H. M.; Magalhaes, A.

doi:10.1016/j.anireprosci.2004.03.005

Cited by 61 publications

(58 citation statements)

References 16 publications

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“…The time to estrus onset in group A (27.9 ± 8.3 h) is less than the 32.6 ± 19.5 h reported by Romano (1998) in Nubian goats treated with FGA. It is also less than the 45.3 ± 13.5 h reported by Romano (2002) in Nubian goats treated with FGA-sponge but similar to the 27.2 ± 11.2 h reported by Fonseca et al (2005) in Toggenburg goats treated with medroxyprogesterone acetate sponges + eCG. Ungerfeld (2011) has reported that the introduction of vasectomised rams and bucks (Romano, 1998) in an estrus synchronization protocol using prostaglandin or progestagens hastens the onset of induced estrus.…”

Section: Discussionmentioning

confidence: 41%

“…This indicates that administration of eCG in group A (concurrent with sponge withdrawal) seemed able to stimulate more does to commence estrus. The 73.8 % obtained in Sahel does treated FGA intravaginal sponge and eCG is less than the 88 % reported by Pendleton et al (1992) in anoestrus dairy goats treated with FGA sponge, the 100 % recorded for Saanen and Nubian goats (Regueiro et al, 1999) and the 87 % (Fonseca et al, 2005) for Toggenburg goats. On the other hand, the estrus response in group B (58.5 %) obtained in this study is higher than the 20 % obtained by Omontese et al (2010) sponges.…”

Section: Discussionmentioning

confidence: 65%

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Induction of estrus in Sahel goats using Fluorogestone Acetate (FGA) sponges and Equine Chorionic Gonadotrophin (ECG)

Omontese¹,

Rekwot²,

Makun³

et al. 2012

Sokoto J. Vet. Sc.

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The objective of the present study was to evaluate the effect of a progestagen treatment alone or in combination with equine chorionic gonadotrophin (eCG) on estrus response in Sahel (SH) goats. One hundred (n=100) SH does were treated with 30 mg fluorogestone acetate (FGA) sponge for 14 days. At the end progestagen treatment, does that retained the intravaginal pessary were allocated into two groups; A: FGA & eCG (n=42) and B: FGA (n=41). Does in group A received additional 200 IU eCG i.m. concurrent with sponge removal. Estrus was detected twice daily (at 07.00 -10.00 and 15.00 -18.00 h) using sexually active bucks for 5 days after pessary removal. Estrus response was different (p<0.05) between A (73.8 %) and B (58.5 %). Estrus onset for group A and B (Mean ± S.E.M.) was 27.9 ± 8.3 and 38.4 ± 9.6 h while estrus duration (Mean ± S.E.M.) for group A and B was 35.8 ± 3.2 and 23.1 ± 5.2 h, respectively. Estrus onset and duration of estrus were different (p<0.05) between group A ( FGA & eCG) and B (FGA). It is concluded that additional eCG treatment following a 14-day progestagen (Fluorogestone acetate) treatment increased estrus response, hastened onset of estrus, lengthened duration of estrus and improved tightness of synchrony in Sahel does.

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Section: Discussionmentioning

confidence: 41%

Section: Discussionmentioning

confidence: 65%

Induction of estrus in Sahel goats using Fluorogestone Acetate (FGA) sponges and Equine Chorionic Gonadotrophin (ECG)

Omontese¹,

Rekwot²,

Makun³

et al. 2012

Sokoto J. Vet. Sc.

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“…Owing to the higher range for the onset of estrus (45 h), these authors obtained an estrus duration (ED) of 25.5 h, similar to that found in this experiment (24.71 h). Fonseca et al (2005b) observed respective averages of 33.7 ± 13.6 h and 26.7 ± 10.0 h of ED in Toggenburg goats using for 6 days of 60 mg MAP, and 22.5 μg PGF2α intramuscularly or in the lateral-vulvar region, and 200 IU of eCG on the fifth day. Moreover, Pietroski et al (2013), reported averages with similar ED; 28.5 h, 21.6 h and 25.2 h for protocols lasting 6, 9, and 12 days, respectively, with 60 mg of MAP, plus 37.5 μg of PGF2α, and 200 IU eCG, both applied to the lateral-vulvar region, and a subsequent dose of hCG 5 days after AI or natural service.…”

Section: Resultsmentioning

confidence: 99%

Application of hormonal subdoses at acupoint Hou Hai in estrus synchronization protocols of goats

Cardoso

Barbosa

Souza

et al. 2018

SCA

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The objective was to evaluate the efficacy of hormonal subdoses at acupoint Hou Hai in estrus synchronization of goats. Sixty-nine females goats received intravaginal sponges containing 60 mg of medroxyprogesterone acetate for seven days and were randomly distributed among three treatments: T1 (n = 23): application of 125 μg of PGF2α on the sixth day (D6) and 300 UI of eCG on the seventh day (D7), both intramuscularly (IM); T2 (n = 23) and T3 (n = 23): application 37.5 μg of PGF2α at D6 and 90 UI of eCG at D7, applied by Hou Hai acupuncture and false acupuncture (IM), respectively. The goats were subjected to hormonal protocol and monitored for the coverage and evaluation of reproductive parameters. The data were subjected to normality analysis, followed by appropriate statistical tests for each variable. Greater numbers of estrus goats were obtained in treatments one (T1 = 100%) and three (T3 = 91.3%) (p < 0.05). No difference was observed (p > 0.05) for sponge removal intervals at the beginning (35.9 h) and end (59.8 h) of estrus, and for the duration of estrus (24.7 h), gestation rate at 30 (77%) and 60 (76.7%) days, and prolificacy (1.9). The use of PGF2α and eCG in subdoses applied to the Hou Hai acupoint or false acupoint was efficient in synchronizing estrus in goats, based on the rate of gestation and prolificity of the animals. Key words: Pharmacopuncture. Hormone. Small ruminants. ResumoObjetivou-se avaliar a eficácia de subdoses hormonais no acuponto Hou Hai na sincronização de estro em cabras. Sessenta e nove fêmeas receberam esponjas intravaginais com 60mg de acetato de medroxiprogesterona por sete dias, e distribuídas aleatoriamente em três tratamentos: T1 (n = 23): aplicação de 125 µg de PGF2 α no sexto dia (D6) e 300UI de eCG no sétimo dia (D7), ambos por via intramuscular (IM); T2 (n=23) e T3 (n=23): receberam 37,5 µg de PGF2 α no D6 e 90UI de eCG no D7, aplicados no acuponto Hou Hai e em falso acuponto (IM), respectivamente. As cabras foram submetidas ao protocolo hormonal e monitoradas para realização das coberturas e avaliação de parâmetros reprodutivos. Os dados foram submetidos à análise de normalidade, seguido dos testes estatísticos adequados para cada variável. Obteve-se maior número de cabras em estro nos tratamentos um (T1=100%) e três (T3=91,3%) (p < 0,05). Não houve diferença (p > 0,05) para os intervalos da retirada da esponja ao início (35,9h) e final (59,8h) do estro, bem como para a duração do estro (24,7h), taxa de gestação aos 30 (77%) e 60 (76,7%) dias, e prolificidade (1,9). O uso de subdoses de PGF 2 α e de eCG aplicados no acuponto Hou Hai ou em falso acuponto foram eficientes na sincronização de estro em caprinos, com base na taxa de gestação e prolificidade dos animais. Palavras-chave: Farmacopuntura. Hormônio. Pequenos ruminantes.

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“…The most commonly used method is the mating of sheep, which occurs after a sponge that has stayed in the vagina for 12-14 days is removed and PMSG is applied in various dosages (Zarkawi, 2001;Husein and Hamit, 2005;Ustuner et al, 2007;Amer and Hazzaa, 2009;Almariol et al, 2011;Ozyurtlu et al, 2011). However, some studies have stated that the application of progesterone impregnated vaginal sponges for short periods such as 6-9 days is sufficient for successful oestrus synchronisation in sheep and goats (Fonseca et al, 2005;Dogan et al, 2008;Ozyurtlu et al, 2011;Machiya et al, 2012). Similarly, it is stated that short periods of sponge applications such as 5-7 days give successful results in oestrus initiation and synchronisation for sheep both during and out of mating season (Fitzgerald et al, 1985;Beck et al, 1993;Vinoles et al, 2001;Ataman et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

The effects of short-mid-long term intravaginal sponge application on reproductive performance of karacabey Merino ewes in the anestrous season

Altinçekiç

Koyuncu

2017

IJAR

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The aim of the present paper was to investigate the efficiency of different progestagen treatment methods in combination with Pregnant Mare Serum Gonadotrophin (PMSG) in Merino ewes outside the breeding season. A total of 78 ewes (2 to 4 years old) with a mean bodyweight of 58.4 kg and an average body condition score (BCS) of 3.5 were used in the trial. The ewes were randomly divided into 3 equal groups [n= 26]. Intravaginal progestagen sponges containing Fluorogestone Acetate (FGA; 30 mg) were inserted intravaginally for different periods (7_days: short-term; 10_days: mid-term, 14_days: long-term). In all cases, 500 IU PMSG was administered intramuscularly at sponge withdrawal. The oestrus response, lambing rate, multiple birth rate, fecundity and litter size were [65.4, 61.5, 18.8 %, 0.77 and 1.25] in the short-term group; 80.8, 88.5, 34.8 %, 1.31 and 1.48 in the mid-term group; and 96.2, 92.3, 62.5 %, 1.50 and 1.63 in the long-term group, respectively. Oestrus manifestation and multiple birth rate were greater in long-term than in mid-and short-term groups, whereas for lambing rate, fecundity and litter size, better results were obtained in long-and mid-term than in short-term protocol. In conclusion, in Merino ewes, oestrus synchronisation outside the breeding season with long and mid-term progestagen treatment was found to be more effective than short-term treatment.

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Induction of estrus in non-lactating dairy goats with different estrous synchrony protocols

Cited by 61 publications

References 16 publications

Induction of estrus in Sahel goats using Fluorogestone Acetate (FGA) sponges and Equine Chorionic Gonadotrophin (ECG)

Induction of estrus in Sahel goats using Fluorogestone Acetate (FGA) sponges and Equine Chorionic Gonadotrophin (ECG)

Application of hormonal subdoses at acupoint Hou Hai in estrus synchronization protocols of goats

The effects of short-mid-long term intravaginal sponge application on reproductive performance of karacabey Merino ewes in the anestrous season

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