Improving the Reproductive Efficiency, Pregnancy Diagnosis and Monitoring the Resumption of Luteal Activity in Indigenous Damascus Goats

Al-Merestani, M.R; Zarkawi, M.; Wardeh, M.F.

doi:10.1046/j.1439-0531.2003.00394.x

Cited by 19 publications

(10 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such successful outcome using progestagen-eCG during the non-breeding season has been reported previously (Zarkawi et al 1999). Steroid hormones concentrations reported in this study are typical of those reported in goats in the anestrus period after estrus induction (Al-Merestani et al 2003). Progesterone profile in the control group is typical of those reported with short luteal phase (Al-Merestani et al 2003).…”

Section: Discussionsupporting

confidence: 84%

“…Steroid hormones concentrations reported in this study are typical of those reported in goats in the anestrus period after estrus induction (Al-Merestani et al 2003). Progesterone profile in the control group is typical of those reported with short luteal phase (Al-Merestani et al 2003). Abrupt introduction of bucks to goats in the transitional period to anestrus is usually followed by ovulation and development of a corpus luteum with short life span which fails prematurely about 4-to 6-day after ovulation (Chimineau 1987).…”

Section: Discussionsupporting

confidence: 74%

“…This breed is seasonal, with an estrous cycle length averaging 21 days. The breeding season of the Damascus goat in the area was reported to concentrate in September and October (Al-Merestani et al 2003) and complete cessation of cyclicity occurring during late April to early August (Zarkawi et al 1999). The present study was conducted in March, at which time goats in Jordan are in late transitional to early seasonal anestrus period.…”

Section: Discussionmentioning

confidence: 85%

See 2 more Smart Citations

The effect of estrus synchronization treatment on somatic cell count of transitional-anestrus local-Damascus cross breed goats’ milk

Talafha

Lafi

Ababneh

2007

Trop Anim Health Prod

View full text Add to dashboard Cite

An experiment was conducted to examine the effect of estrus synchronization protocols and steroid hormones concentrations on somatic cell count (SCC) of transitional-anestrus local-Damascus cross goats' milk. Fifty-six goats (2-4-year old) were randomly assigned to three groups: fluorogestone acetate (FGA, n = 19), FGA-Prostaglandin (FGA-PGF, n = 19) and control (n = 18) groups. Intravaginal sponge containing 40 mg FGA was inserted for 13 days and an injection of 600 IU equine chorionic gonadotropin (eCG) was administered for goats of FGA and FGA-PGF groups at the time of sponge removal (day 0). In addition, goats of FGA-PGF group were injected with 10 mg dinoprost tromethamine (PGF2alpha) on day 0. Five fertile local-Damascus cross bucks were turned-in with all goats on day 0. Blood and milk samples were collected from all goats on days -13 (beginning of experiment), -6, 0, 1, 2, 7, 13 and 20 (end of the experiment). Four-year old and second-parity goats had significantly higher (p < 0.05) SCC of both udder halves than 2- and 3-year old and first-parity goats, respectively. There was a significant effect (p < 0.05) for treatment and number of kids born in the last kidding season on SCC of both udder halves. Neither estradiol nor progesterone concentrations were correlated with SCC in goats in this experiment. The SCC of both udder halves and left udder halves in goats of the control and FGA groups, respectively, increased significantly (p < 0.05) after sponge removal and buck introduction when compared with day 0, with no differences in the FGA-PGF group. This increase in SCC of the control and FGA groups coincided with peak estrus behavior. However, SCC was far below the upper limit of the current standard for normal milk. In conclusion, induction of estrus with progestagen based programs and buck introduction may cause temporary significant increase in SCC. However, the SCC values during this period of temporary increase were still in the range of acceptable values for normal milk. With the current standards for SCC of 1,000,000/ml as legal limit for abnormal milk control programs in goats, estrus synchronization programs and the estrus status should not be considered when bulk-tank milk SCC is being investigated.

show abstract

Section: Discussionsupporting

confidence: 84%

Section: Discussionsupporting

confidence: 74%

Section: Discussionmentioning

confidence: 85%

See 1 more Smart Citation

The effect of estrus synchronization treatment on somatic cell count of transitional-anestrus local-Damascus cross breed goats’ milk

Talafha

Lafi

Ababneh

2007

Trop Anim Health Prod

View full text Add to dashboard Cite

show abstract

“…1997;Motlomelo et al, 2002;Al-Merestani et al, 2003;Romano, 2004;Dogan et al, 2008), where FGA sponges, in period changed between 6-16 days, with combination of eCG and PGF 2α or both, were used in goats during the transition period or breeding season.…”

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

View full text Add to dashboard Cite

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

show abstract

“…Moreover, previous studies reported a high level of estrus synchronization using a combination of progesterone and eCG in ewes [20] and goats [26,32]. A combination of progesterone and eCG has been used in ewes and goats during the non-breeding as well as breeding seasons [2,8, 15,18]. However, it has been suggested that long periods of progesterone treatment are associated with lower fertility [10,31].…”

Section: Introductionmentioning

confidence: 99%

Luteal lifespan and fertility after estrus synchronization in goats

et al. 2008

View full text Add to dashboard Cite

The present experiment aims to examine the efficiency of estrus synchronization using progesterone and equine chorionic gonadotrophin (eCG) and to look at luteal function. During the non-breeding and breeding season, 5 adult female Korean native goats were injected intramuscularly with 2.5 ml of physiological saline as the control. A progesterone impregnated intravaginal sponge was then kept in the same goats for 10 days followed, after a week, by an intramuscular injection of 500 IU eCG. Five adult female Nubian goats were mated with a fertile buck during the non-breeding season. During the non-breeding season 2 of the 5 goats showed a normal estrous cycle (ranging from 18 to 21 days) and 3 a short estrous cycle (ranging from 3 to 6 days). During the breeding season the equivalent figures were 1 and 2. The major axes of the corpus luteum (CL) were measured by means of calipers built into the ultrasonography system, and the concentrations of plasma progesterone (P4) were determined by double antibody radioimmunoassay. The mean major axes of the CL in goats showing the short cycle (6.1 ± 0.5 mm) was significantly smaller than in those showing the normal cycle (8.9 ± 0.5 mm; p < 0.01) and also the value of P4 in goats showing the short cycle (4.2 ± 2.1 ng/ml) was significantly lower than for those showing the normal cycle (10.3 ± 4.3 ng/ml; p < 0.05) at day 3 following ovulation. Three out of 5 Nubian goats became pregnant but only one goat carried to full term. The present experiment indicated that a combination of progesterone and eCG was effective in inducing estrus, although it resulted in a high incidence of short luteal lifespan. The low kidding rate and high incidence of embryonic loss may be due to the instability of the luteal lifespan.

show abstract

Improving the Reproductive Efficiency, Pregnancy Diagnosis and Monitoring the Resumption of Luteal Activity in Indigenous Damascus Goats

Cited by 19 publications

References 16 publications

The effect of estrus synchronization treatment on somatic cell count of transitional-anestrus local-Damascus cross breed goats’ milk

The effect of estrus synchronization treatment on somatic cell count of transitional-anestrus local-Damascus cross breed goats’ milk

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

Luteal lifespan and fertility after estrus synchronization in goats

Contact Info

Product

Resources

About