Effect of medroxyprogesterone acetate and eCG treatment on the reproductive performance of dairy goats

Regueiro, M.; Clariget, Raquel Pérez; Ganzábal, A.; Aba, M.A.; Forsberg, M.

doi:10.1016/s0921-4488(99)00024-3

Cited by 23 publications

(14 citation statements)

References 21 publications

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“…This is lower than the 94% and 88% reported by Pendleton et al (1992) in anoestrus dairy goats treated with norgestomet and FGA sponge, respectively. This value is also lower than the 100% recorded for Saanen and Nubian goats (Regueiro et al, 1999) and the 87% (Fonseca et al, 2005) recorded for Toggenburg goats. In addition, Dogan et al (2004) reported a 100% oestrus response in Saanen does using FGA sponges in combination with 125 μg cloprostenol (PGF 2α ), similar to Ahmed et al (1998) in Sudanese Nubian goats.…”

Section: Resultscontrasting

confidence: 59%

Oestrus induction using fluorogestone acetate sponges and equine chorionic gonadotrophin in Red Sokoto goats

Omontese¹,

Rekwot²,

Makun³

et al. 2013

SA J. An. Sci.

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________________________________________________________________________________ AbstractThe objective of this study was to evaluate the effect of a progestagen treatment (fluorogestone acetate sponge) alone or in combination with equine chorionic gonadotrophin (eCG) on oestrus response in Red Sokoto (RS) goats. One hundred RS does were treated with 30 mg fluorogestone acetate (FGA) sponges for 14 days. At the end of the progestagen treatment, does that retained the sponges were allocated to two groups; FGAeCG and FGA. The FGAeCG group (n = 28) received 200 IU eCG i.m. concurrently with the sponge removal, while the FGA group (n = 28) did not receive eCG at sponge removal. Oestrus was detected twice daily (at 07:00 -10:00 and 15:00 -18:00) using sexually active bucks for five days following progestagen withdrawal. There was no significant difference in oestrus response between groups FGAeCG (82.1%) and FGA (78.6%). There was a significant difference in the time to the onset (29.3 ± 4.6 and 44.2 ± 6.3 h for the FGAeCG and FGA, respectively) and duration of the induced oestrus period (38.9 ± 5.1 and 22.7 ± 4.6 h for the FGAeCG and FGA groups, respectively). It is concluded that although both groups showed good oestrus synchronization rates, administration of eCG shortened the time to onset of oestrus and increased the duration of oestrus in Red Sokoto does. ________________________________________________________________________________

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Section: Resultscontrasting

confidence: 59%

Oestrus induction using fluorogestone acetate sponges and equine chorionic gonadotrophin in Red Sokoto goats

Omontese¹,

Rekwot²,

Makun³

et al. 2013

SA J. An. Sci.

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“…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: 64%

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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“…The eCG is known to reduce the interval between sponge removal and onset of oestrus (Greyling et al, 1985). Regueiro et al (1999) informed that the use of 500 IU eCG decreased the interval to oestrus onset in Saanen, Nubian and cross-breed goats. However, it was reported that there was not a significant effect of the type of progestagen sponges or time of PMSG administration on the time to oestrus onset in ewes (Zeleke et al, 2005;Ustuner et al, 2007).…”

Section: Resultsmentioning

confidence: 99%

Oestrus synchronization with short-term and long-term progestagen treatments in goats: the use of GnRH prior to short-term progestagen treatment

Karaca

Doğruer

Saribay

et al. 2010

Italian Journal of Animal Science

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The aim of the present study was to determine the efficacy of the synchronization of oestrus using short- and long-term progestagen treatments in Hair goats at the onset of the breeding season, and to evaluate the effect of the exogenous GnRH administration immediately prior to short-term progestagen treatment on the reproductive performance. A total of 75 Hair goats, aged 2.5-5 years-old were used in this experiment. Goats were divided equally into three groups (n=25 per group). Animals in LT-FGA (long-term progestagen treatment), ST-FGA (short-term progestagen treatment) and Gn-ST-FGA (GnRH-short-term progestagen treatment) groups received an intravaginal sponge (day 0) containing 30 mg fluorogestone acetate (FGA) for 14, 8 and 8 days, respectively, plus 75 μg cloprostenol i.m. 24 h before sponge removal and 400 I.U. equine chorionic gonadotrophin (eCG) i.m. at the time of sponge removal. In addition, the goats in the Gn-ST-FGA group received 10.5 μg busereline acetate i.m. at the time of sponge insertion (day 0). Oestrus response for all treatment groups was 100%. The mean interval from sponge removal and the onset of oestrus for the LT-FGA, ST-FGA and Gn-ST-FGA groups was 28.0±1.0 h, 28.83±1.1 h and 33.1±2.0 h, respectively. No significant difference in onset of oestrus among groups was recorded. The pregnancy rate, kidding rate, multiple kidding rates and litter size were 72.0, 61.1, 45.5% and 1.6 in the LT-FGA, 70.8, 76.5, 69.2% and 1.8 in the ST-FGA and 58.3, 78.6, 63.6% and 1.6 in the Gn-ST-FGA groups, respectively. The pregnancy rates were similar in the LT-FGA (72.0%) and ST-FGA (70.8%). However, the kidding rate, multiple kidding rates and litter size were numerically higher in the ST-FGA (76.5%, 69.2% and 1.8, respectively) group than in the LT-FGA (61.1%, 45.5% and 1.6, respectively) group. Although not statistically different, pregnancy rate and litter size was lower in the Gn-ST-FGA group (58.3% and 1.6, respectively) compared with the ST-FGA (70.8% and 1.8, respectively). In conclusion, it can be said that oestrus synhcronization with long-term progestagen treatment (14 d-FGA- PGF2α- eCG) could be replaced with short-term progestagen treatment (8 d-FGA-PGF2α- eCG) without a reduction in oestrus rate and fertility parameters in lactating goats at the beginning of breeding season. However, the use of GnRH prior to short-term progestagen treatment (8 d-FGAPGF2α- eCG) do not have a positive effect on fertility parameters in goats

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Effect of medroxyprogesterone acetate and eCG treatment on the reproductive performance of dairy goats

Cited by 23 publications

References 21 publications

Oestrus induction using fluorogestone acetate sponges and equine chorionic gonadotrophin in Red Sokoto goats

Oestrus induction using fluorogestone acetate sponges and equine chorionic gonadotrophin in Red Sokoto goats

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

Oestrus synchronization with short-term and long-term progestagen treatments in goats: the use of GnRH prior to short-term progestagen treatment

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