Current knowledge and future challenges in camelid reproduction

Tibary, Ahmed; Anouassi, A.; Sghiri, Abdelmalek; Khatir, H.

doi:10.5661/rdr-vi-297

Cited by 14 publications

(36 citation statements)

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“…The LH surge triggers resumption of meiosis in the oocyte, disruption of cumulus cell cohesiveness and rupture of the follicular wall (Vaughan, 2011). Cumulus dispersion is observed in cumulusoocyte complexes (COC) recovered by aspiration from follicles 18 to 24 hours after human chorionic gonadotropin (hCG) injection (Del Campo et al, 1995;Tibary et al, 2007).…”

Section: Ovulation and Fertilizationmentioning

confidence: 99%

“…Follicular waves overlap continuously in the absence of mating (Skidmore, 2011;Tibary et al, 2007;Vaughan, 2011). The preovulatory luteinizing hormone (LH) surge occurs after mating in response to an ovulation inducing factor (OIF) in seminal plasma.…”

Section: Ovulation and Fertilizationmentioning

confidence: 99%

“…Knowledge of embryonic development, fetal development and characteristics of placentation are fundamental not only for diagnosis of pregnancy and fetal evaluation but also for clinical and pathological evaluation in cases of pregnancy loss or abortion. In addition, the understanding of early embryo development and mechanisms of MRP are important for developing therapeutic strategies to prevent early embryonic death, as well as progressing advanced reproductive techniques such as embryo transfer technologies (Tibary et al, 2007).…”

Section: Early Embryonic Development In Camelidsmentioning

confidence: 99%

“…This process, which can be summarized as a mechanism of prevention of luteolysis, involves signaling between the embryo and the uterus leading to successful attachment/implantation. In-depth studies on MRP have been sparked by the impact of early pregnancy loss on productivity in various species such as cattle (Diskin and Morris, 2008), camelids (Fernandez-Baca et al, 1970;Tibary et al, 2007;, and horses (Allen et al, 2007;Ball and Woods, 1987;Canisso et al, 2013;Vanderwall, 2008). Additionally, early embryonic loss (during the pre-implantation period) is a common problem with many advanced reproductive biotechnologies involving embryo/gamete manipulations.…”

Section: Introductionmentioning

confidence: 99%

“…Pregnancy loss is the second most common complaint in camelid reproduction (Pearson et al, 2014;Tibary et al, 2007;Verdier and Bornstein, 2010). Epidemiological data on the incidence of pregnancy loss in camelids is scarce (Knight et al, 1995;Tibary, 2010;Vaughan and Tibary, 2006).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Early Embryonic Development and Maternal Recognition of Pregnancy in Camelids: A Review

Campbell¹,

Ciccarelli²,

Tibary³

2017

SPERMOVA

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Section: Ovulation and Fertilizationmentioning

confidence: 99%

Section: Ovulation and Fertilizationmentioning

confidence: 99%

Section: Early Embryonic Development In Camelidsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Early Embryonic Development and Maternal Recognition of Pregnancy in Camelids: A Review

Campbell¹,

Ciccarelli²,

Tibary³

2017

SPERMOVA

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Fixed-time induction of ovulation in camels superovulated by different eCG modalities during the transition period in Egypt

Khalifa

Rateb

El-Bahrawy

2016

Trop Anim Health Prod

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The current investigation aimed to establish a fixed-time induction of ovulation/ insemination protocol in camels superovulated by different equine chorionic gonadotropin (eCG) regimens during the transition period in Egypt (mid-October to mid-November). Seventeen pluriparous camels, Camelus dromedarius, were used. All females retained controlled intra-vaginal drug releasers (CIDRs) for 13 consecutive days, and at CIDR withdrawal, the camels were randomly divided into three groups. The control group (n = 5) received 1 ml saline intra-muscularly (i.m.), whereas remaining camels were superovulated by 2500 IU eCG either in a single shot (SS, n = 6) or in serial decreasing doses over 3 days (DD, n = 6). Ovarian dynamics were monitored by transrectal ultrasonography at 2-day intervals, and ovulation was induced by 5000 IU hCG i.m. The changes in reproductive hormones throughout the period of the study were determined. The results showed that mean values of total no. of follicles and size of dominant follicles remained low (P < 0.05) in all groups until day of CIDR removal. Thereafter, total follicle no. increased (P < 0.05) in both superovulated groups compared to the control, where the dominant follicles attained the highest (P < 0.05) diameter 12 days after the eCG treatment. Double-ovulation rate was higher (P < 0.05) in SS (50%) and DD (66.6%) groups compared to that of control (0.0%). However, 33.3% of the SS group developed large anovulatory follicles (ø > 25 mm), which did not respond to induction to ovulation. These results elucidate that eCG administration in serial decreasing doses generates a reliable superovulatory response in camels, and ovulation can be blindly induced 12 days after the gonadotropin treatment. This fixed-time hormonal protocol represents a sufficient alternative to conventional day-to-day ultrasonography and would have profound implication for enhanced fertility in dromedary camels by facilitating infield application of embryo transfer technique.

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Embryo Transfer

Sumar¹,

Picha²

2014

Llama and Alpaca Care

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Current knowledge and future challenges in camelid reproduction

Cited by 14 publications

References 0 publications

Early Embryonic Development and Maternal Recognition of Pregnancy in Camelids: A Review

Early Embryonic Development and Maternal Recognition of Pregnancy in Camelids: A Review

Fixed-time induction of ovulation in camels superovulated by different eCG modalities during the transition period in Egypt

Embryo Transfer

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