Effect of service and vaginal-cervical anesthesia on estrus duration in dairy goats

Romano, Juan E.; Benech, A.

doi:10.1016/0093-691x(95)00415-5

Cited by 17 publications

(8 citation statements)

References 12 publications

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“…The mean overall duration of the induced estrous period (29.7 ± 1.3 h) recorded in this study is similar to that reported by Greyling and Van der Nest (2000) and Motlomelo et al (2002) and lower than that reported by Romano (1996), Romano and Benech (1996), Romano and Fernandez Abella (1997) and Romano et al (2000). The mean estrous duration was shorter (P < 0.05) in the MAP/ PMSG treatment (26.3 ± 2.4 h), compared to the FGA/PMSG/PGF 2α treatment (34.5 ± 3.0 h).…”

Section: Discussionsupporting

confidence: 69%

“…A relatively similar interval was mentioned by Leboeuf et al (2003), were intravaginal FGA (20 or 45 mg) sponges during the breeding and non-breeding season. With respect to the onset estrous, on the other hand, bigger periods have been reported by Baril et al (1993), Romano (1996Romano ( , 1998Romano ( , 2002, Romano and Benech (1996), Romano and Fernandez Abella (1997), Freitas et al (1996aFreitas et al ( ,b, 1997, Greyling and Van der Nest (2000) and Motlomelo et al (2002) in does. The reason for differences is not clear, however it may be attributed to differences in breed, nutrition, season, use of gonadotrophins, presence of females in proestrous/estrous and presence of the male after sponge removal all factors that are known to influence this parameter (Doney et al, 1973;Greyling and Van Niekerk, 1990;Mani et al, 1992;Romano, 1998Romano, , 2002Ahmed et al, 1998).…”

Section: Discussionmentioning

confidence: 96%

“…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: Discussionmentioning

confidence: 99%

“…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: 69%

Section: Discussionmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 99%

mentioning

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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“…Goldfoot & Goy, 1970; Carter & Schein, 1971; Hardy & DeBold, 1972; Oglesby et al. , 1981; Romano & Benech, 1996; review in Huck & Lisk, 1986). Importantly, male rodents may thus experience opposing selection pressures with respect to offensive and defensive aspects of sperm competition – that is, the need to increase sperm transfer with rapid and/or frequent ejaculations, as demonstrated here, while also providing sufficient copulatory stimulation to reduce the probability that their ejaculates will be diluted in subsequent copulations.…”

Section: Evolution Of Multiple Intromissionsmentioning

confidence: 99%

Sperm competition and diversity in rodent copulatory behaviour

Stockley

Preston

2004

Journal of Evolutionary Biology

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The copulatory behaviour of male mammals is characterized by striking diversity in patterns of copulatory stimulation and ejaculation frequency. We conducted comparative analyses of rodents to investigate the potential influence of sperm competition in the evolution of copulatory behaviour. We found that increasing sperm competition is associated with faster rates of stimulation and earlier ejaculation among species in which males perform multiple intromissions prior to ejaculation, but with no overall change in the number of intromissions per ejaculation. Increasing sperm competition is also associated with a higher frequency of repeated ejaculations with the same female, and with shorter refractory periods between repeated copulations. Increasing sperm competition level thus appears to select for male ability to ejaculate more rapidly and more frequently with each female mated. As prolonged copulations are known to reduce female remating rates, these findings indicate that males may experience opposing selection pressures on copulatory behaviour with respect to offensive and defensive aspects of sperm competition. We conclude that sperm competition is likely to be an important selection pressure explaining diversity in mammalian copulatory behaviour.

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Vaginal Drug Delivery

Neves

Amaral

Bahia

2010

Pharmaceutical Sciences Encyclopedia

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The vagina has been used for a long time as a route for drug administration. Vaginal drug delivery has seen recent advances that make it very promising, in particular therapeutic fields such as the prevention of human immunodeficiency virus (HIV) and other sexually transmitted infections, and contraception. This article discusses the main features of vaginal anatomy, physiology, and histology related to drug delivery as well as vaginal drug delivery systems and their evaluation, current usage of the vagina as a route of drug administration, and promising strategies in this field.

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Effect of service and vaginal-cervical anesthesia on estrus duration in dairy goats

Cited by 17 publications

References 12 publications

Estrous synchronization during the natural breeding season in Anatolian black does

Estrous synchronization during the natural breeding season in Anatolian black does

Sperm competition and diversity in rodent copulatory behaviour

Vaginal Drug Delivery

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