Effect of service on duration of oestrus and ovulation in dairy goats

Romano, Juan E.; Abella, D. Fernández

doi:10.1016/s0378-4320(96)01633-8

Cited by 33 publications

(16 citation statements)

References 17 publications

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“…Within 66 h there were no significant differences among 4 groups in terms of estrous response. The high estrous response recorded during the 66 h observation period following the cessation of treatment (overall mean response 92.9%) is within the range of 62.5-100% quoted in treatments with FGA or MAP intravaginal sponges (Romano, 1996(Romano, , 1998(Romano, , 2002Romano and Benech, 1996;Romano and Fernandez Abella, 1997;Greyling and Van der Nest, 2000;Motlomelo et al, 2002) or in combination with PGF 2α (Baril et al, 1993;Freitas et al, 1996aFreitas et al, ,b, 1997Ak et al, 1998;Leboeuf et al, 2003).…”

Section: Discussionsupporting

confidence: 55%

“…The most widely used procedures for synchronization and/or the induction of estrous are 12-21 days of FGA or MAP impregnated intra vaginal sponge treatment (Romano, 1996(Romano, . 1998(Romano, ,2002Romano and Benech, 1996;Romano and Fernandez Abella, 1997;Leboeuf et al, 1998;Romano et al, 2000) and an intramuscular injection of PMSG at progestagen withdrawal (Ak et al, 1998;Greyling and Van der Nest, 2000;Motlomelo et al, 2002), or 11 days treatment with FGA impregnated intravaginal sponges and an intramuscular injection of PMSG and a synthetic PGF 2α analogue 48 h before or at sponge withdrawal (Baril et al, 1993;Freitas et al, 1996aFreitas et al, ,b, 1997Ak et al, 1998;Leboeuf et al, 2003). Even though some studies have found these two progestagens to be equally effective in the induction of estrous, ovulation and fertility (Gordon, 1975;Smith et al, 1981), some researchers have found some difference between the effectiveness of the two types progestagen sponges (Evans and Maxwell, 1987).…”

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confidence: 99%

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Estrous synchronization during the natural breeding season in Anatolian black does

Doğan¹,

Nur²,

Günay³

et al. 2005

Vet. Med. - Czech

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ABSTRACT:The efficiency of medroxyprogesterone acetate (MAP) and fluorogestone acetate (FGA) sponges with or without PGF 2α (cloprostenol) for synchronizing estrous in non-lactating does was investigated during the natural breeding season. Does were treated for 11 days with 60 mg MAP (n = 38) or 40 mg FGA (n = 32) sponges. All does also received intramuscular injections of 500 IU PMSG. In addition, 19 and 14 of the does synchronized with MAP and FGA respectively, were injected with 125 µg cloprostenol and the remaining does from both groups were injected with 1.5 ml of sterile saline solution, 48 h prior the sponge removal. Cervical artificial insemination (AI) with diluted fresh semen was performed at a fixed time (36 and 48 h) following progestagen withdrawal. The different groups estrous response for the first 12 ± 6 h and within 66 h, time to onset and duration of the induced estrous, and pregnancy rate was found to be 52.6%, 92.9%, 20.6 ± 0.8 h, 29.7 ± 1.3 h, and 70.0%, respectively. There were significant differences between groups FGA/PMSG/PGF 2α and MAP/PMSG in terms of the duration of induced estrous (P < 0.05) and between groups FGA/PMSG/PGF 2α and FGA/PMSG in terms of estrous response at the first 12 ± 6 h (P < 0.05). These results indicate that, the use of MAP/PMSG and FGA/PMSG intravaginal progestagen treatments with or without cloprostenol are equally efficient in synchronizing estrous in non-lactating hair goats during the natural breeding season.

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Section: Discussionsupporting

confidence: 55%

mentioning

confidence: 99%

Estrous synchronization during the natural breeding season in Anatolian black does

Doğan¹,

Nur²,

Günay³

et al. 2005

Vet. Med. - Czech

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“…On the other hand, Romano and Abella (1997) did not find activity differences between the right and left ovaries in Nubian goats.…”

Section: Menchacacontrasting

confidence: 58%

Effects of prostaglandin administration 10 days apart on reproductive parameters of cyclic dairy nulliparous goats

Fonseca

Maffili

Fürst

et al. 2012

Arq. Bras. Med. Vet. Zootec.

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“…Such elongation of estrus was observed in does in group A. It is reported that that the mean duration for standing estrus varies between animals and from one estrus to another (Akusu & Egbunike, 1990;Teleb et al, 2003) and may be influenced by number of services (Romano & Fernandez Abella, 1997). On the other hand, Hafez (1993) reported that duration of estrus is species-dependent and varies slightly from one female to another, within the same species.…”

Section: Discussionmentioning

confidence: 74%

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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Effect of service on duration of oestrus and ovulation in dairy goats

Cited by 33 publications

References 17 publications

Estrous synchronization during the natural breeding season in Anatolian black does

Estrous synchronization during the natural breeding season in Anatolian black does

Effects of prostaglandin administration 10 days apart on reproductive parameters of cyclic dairy nulliparous goats

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

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