Estrous cycle characteristics and response to estrus synchronization in mammoth asses (equus asinus americanus)

Blanchard, T.L.; Taylor, T.; Love, C.C.

doi:10.1016/s0093-691x(99)00175-2

Cited by 49 publications

(58 citation statements)

References 8 publications

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“…The interval between treatment and the occurrence of PGF 2α -induced estrus and estrous length were not significantly different among jennies treated 3 days after ovulation and those treated at 5, 7 and 9 days after ovulation. The interval between treatment and estrus occurrence, independent of the treatment group, is in agreement with the value of 4.4 ± 1.6 days reported by Blanchard et al (1999). In addition, it is interesting to note that, in the present study, the length of PGF 2α -induced estrus was shorter compared to spontaneous estrus length (6.5±0.68 days) (Carluccio et al, 2003).…”

Section: Discussionsupporting

confidence: 92%

“…Most researchers consider the equine corpus luteum sensitive to PGF 2α not earlier than 5 days after ovulation, with the best luteolytic response obtained between 6 and 11 days after ovulation, with a decrease of progesterone (P4) plasma concentrations below 1 ng/ml within 24-36 h after treatment (Allen and Rowson, 1973;Camillo et al, 1994). Diestrus seems to be longer in the jenny (16.8 ± 0.62 days) than in the mare (Meira et al, 1995;Carluccio et al, 2003), and PGF 2α administration is also used for estrous synchronization in donkeys (Blanchard et al, 1999). The aim of this study was to detect the earliest corpus luteum sensitivity to exogenous PGF 2α in Martina Franca jennies.…”

Section: Introductionmentioning

confidence: 90%

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Corpus Luteum Sensitivity to PGF2α Administration in the Martina Franca Jenny

et al. 2006

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Section: Discussionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 90%

Corpus Luteum Sensitivity to PGF2α Administration in the Martina Franca Jenny

et al. 2006

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“…The general application of ultrasonography in the study of reproductive events in jennies has been described (Ginther et al, 1987;Meira et al, 1995;Blanchard et al, 1999). Although there is little detailed description of the ultrasonic anatomy of the reproductive system, of the jenny, the characteristic images of ovarian structures and uterus found in the present study are generally similar to those found in mares (Ginther, 1995;Riddle, 1998;Pycock, 2002).…”

Section: Discussionsupporting

confidence: 70%

Application of ultrasonography in the study of the reproductive system of tropical jennies (shape Equus asinus)

Lemma

Schwartz

Bekana

2006

Trop Anim Health Prod

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The use of high-frequency (5 MHz) ultrasonography was studied in 11 jennies (7 non-pregnant and 4 pregnant) to characterize the reproductive organs and follicular activities at different stages of reproduction. The result showed close similarity with the mare. The visibility of endometrial folds increased towards ovulation. A positive correlation (p < 0.001; tau = 0.79) was found between the score of the folds and the size of the dominant follicle. The diameter of the uterus and the size of the dominant follicle were significantly correlated (p < 0.001; r = 0.80). In pregnant jennies, an embryonic vesicle was detectable at 14 days. Follicular growth was characterized by more than one wave. The smallest ovarian follicle was 2 mm and the largest 40mm. Depending on the reproductive stage, up to 13 follicles were detected per ovary. After monitoring 84 cycles, a mean (+/- SD) diameter of 34.4 +/- 3.6 mm (27.5-40.2 mm) of the preovulatory follicle and 67.85% incidence of single ovulation were found. The mean (+/-SD) interovulatory interval was 25.7 +/- 6 days. This study proved that high-frequency ultrasonography is highly effective in characterizing the reproductive organs and follicular activity of jennies and could be useful in the reproductive management of donkeys.

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“…Moreover, both species are also bred as hobby animals in Europe, Australia, USA and other countries (Webster 2011) and although they are not closely related species, there are some similarities in their reproduction. The oestrous cycle in donkey jennies is influenced by season (Blanchard et al 1999); however, according to Contri et al (2014), not as strongly as in horse mares. In jennies, oestrous can be present during whole year in Europe.…”

mentioning

confidence: 88%

Non-invasive Pregnancy Diagnosis from Urine by the Cuboni Reaction and the Barium Chloride Test in Donkeys (Equus asinus) and Alpacas (Vicugna pacos)

Kubátová¹,

Fedorova²,

Hyniová³

2016

Polish Journal of Veterinary Sciences

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The aim of the research was to evaluate two chemical tests for non-invasive pregnancy diagnosis from urine, the Cuboni reaction and the barium chloride test, in donkeys (Equus asinus) and alpacas (Vicugna pacos). The research was carried out from April 2013 to September 2014. Urine samples were collected on five private Czech farms from 18 jennies and 12 alpaca females. Urine was collected non-invasively into plastic cups fastened on a telescopic rod, at 6-9 week intervals. In total, 60 and 54 urine samples from alpacas and jennies, respectively, were collected. The Cuboni reaction was performed by the State Veterinary Institute Prague. The barium chloride test was done with 5 ml of urine mixed together with 5 ml of 1% barium chloride solution. Results of the Cuboni reaction were strongly influenced by the reproductive status of jennies; the test was 100% successful throughout the second half of pregnancy. However, no relationship was found between the real reproductive status of alpaca females and results of the Cuboni reaction. It was concluded that the barium chloride test is not suitable for pregnancy diagnosis either in donkeys, due to significant influence of season on the results, or in alpacas, because no relationship between results of the test and the reproductive status of alpaca females was found. In conclusion, the Cuboni reaction has potential to become a standard pregnancy diagnostic method in donkeys.

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Estrous cycle characteristics and response to estrus synchronization in mammoth asses (equus asinus americanus)

Cited by 49 publications

References 8 publications

Corpus Luteum Sensitivity to PGF2α Administration in the Martina Franca Jenny

Corpus Luteum Sensitivity to PGF2α Administration in the Martina Franca Jenny

Application of ultrasonography in the study of the reproductive system of tropical jennies (shape Equus asinus)

Non-invasive Pregnancy Diagnosis from Urine by the Cuboni Reaction and the Barium Chloride Test in Donkeys (Equus asinus) and Alpacas (Vicugna pacos)

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