Comparison of fluorogestone acetate sponges with norgestomet implants for induction of estrus and ovulation in anestrous dairy goats

Pendleton, R.J.; Youngs, Curtis R.; Rorie, R.W.; Pool, S.H.; Memon, Mushtaq A.; Godke, R.A.

doi:10.1016/0921-4488(92)90048-9

Cited by 12 publications

(7 citation statements)

References 6 publications

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“…This indicates that administration of eCG (concurrently with sponge withdrawal) seemed able to stimulate more does to commence oestrus. 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.…”

Section: Resultscontrasting

confidence: 49%

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: 49%

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: 70%

“…High reproductive performance is essential for profit in goat meat production and is determined by the number of progeny delivered in a given time (Ezekwe & Lovin, 1997). The use of intravaginal progestagens followed by pregnant mare's serum gonadotrophin (PMSG) injection to synchronize estrus during the normal breeding season (Menegatos et al, 1995), to induce estrus out of season (Karatzas et al, 1997), and to improve ovulation rate (Greyling & Van Niekerk, 1990;Pendleton et al, 1992;Omontese, 2012) has been reported. However, the additional use of eCG attracts more input cost to the producer.…”

Section: Introductionmentioning

confidence: 99%

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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“…During the anoestrous season, this is combined with an intramuscular dose of eCG to induce ovulation (Corteel et al. 1988; Pendleton et al. 1992).…”

Section: Introductionmentioning

confidence: 99%

“…In goats, like in sheep, oestrus is usually synchronized by using intravaginal progestagen impregnated sponges. During the anoestrous season, this is combined with an intramuscular dose of eCG to induce ovulation (Corteel et al 1988;Pendleton et al 1992). This protocol was adapted from earlier synchronization treatments in sheep (Robinson et al 1967;Boland and Gordon 1973).…”

Section: Introductionmentioning

confidence: 99%

Preovulatory Follicle Development in Goats Following Oestrous Synchronization with Progestagens or Prostaglandins

Fernandez-Moro¹,

Veiga-López

Ariznavarreta³

et al. 2007

Reprod Domestic Animals

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The study reports on differences in the dynamics of growth and functionality of preovulatory follicles in response to oestrous synchronization, either by the administration of two doses of prostaglandin or by an intravaginal progestagen sponge, in goats. The progestagen-treated group (n = 8) showed more follicles of preovulatory size (> or =5.5 mm) than the cloprostenol group (n = 8) during the follicular phase (4.5 +/- 0.6 vs 1.9 +/- 0.2, p < 0.01). The diameters of the largest follicles (LF1, LF2 and LF3) were also larger in the progestagen group (LF1, 7.8 +/- 0.3 vs 7.0 +/- 0.2 mm, p < 0.05; LF2, 6.7 +/- 0.2 vs 5.6 +/- 0.2 mm, p < 0.01; LF3, 5.5 +/- 0.3 vs 4.2 +/- 0.2 mm, p < 0.01). The study of the preovulatory follicles showed that 27.2% (3/11) of the follicles were in the static phase in the cloprostenol group, whilst 71.4% (10/14) were static in progestagen group (p < 0.05). Higher plasma oestradiol levels were recorded in the progestagen-treated goats during the 48 h prior to cloprostenol injection or progestagen withdrawal (4.2 +/- 0.4 vs 3.0 +/- 0.2 pg/ml, p < 0.05). In conclusion, goats with oestrus synchronized by progestagen showed a higher number of preovulatory-sized follicles, but a decreased oestradiol secretion when compared with does with oestrus synchronized by using prostaglandin analogues. These would support the development of alternative protocols for assisted reproduction.

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Comparison of fluorogestone acetate sponges with norgestomet implants for induction of estrus and ovulation in anestrous dairy goats

Cited by 12 publications

References 6 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)

Preovulatory Follicle Development in Goats Following Oestrous Synchronization with Progestagens or Prostaglandins

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