Semen-induced ovulation in the bactrian camel (Camelus bactrianus)

Chen, B. X.; Yuen, Z. X.; Pan, Guangliang

doi:10.1530/jrf.0.0740335

Cited by 120 publications

(86 citation statements)

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“…The scarcity of corpora lutea in the genital tracts of non-pregnant camels can be ascribed to the induced nature of ovulation in this species (Elias et al, 1984;Chen et al, 1985) and the short lifespan of the corpora lutea formed after sterile mating (Fernandez-Baca et al, 1970;Musa & Abusineina, 1978a;Marie & Anouassi, 1987). The progesterone pattern after sterile mating in the camel, in contrast to other farm animals, is characterized by absence of a plateau and early luteolysis (Marie & Anouassi, 1987 (1981).…”

Section: Discussionmentioning

confidence: 99%

A study of the genital organs of the female dromedary (Camelus dromedarius)

Elwishy

1988

Reproduction

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Summary. Camels (416 pregnant, 118 non-involuted post partum and 730 nonpregnant) were examined post mortem. Large follicles (>10 mm), small follicles (5\p=n-\10mm) and non-functional ovaries were observed in 144 (20\m=.\7%), 127 (18\m=.\3%) and 424 (61\m=.\0%)respectively out of 695 normal non-pregnant organs. Season did not exert any significant influence on the frequency of these groups. Recently formed and regressing CL after sterile mating were occasionally seen. Corpora albicantia (3\p=n-\15mm) were the most frequent structures observed in non-pregnant organs of parous camels as well as in pregnant tracts, together with the CL of pregnancy: 17% of ovaries contained more than one luteal structure. Pregnancy was easily recognized as early as 40\p=n-\45 days of gestation because of the marked swelling of the left uterine horn in which 99\m=.\52%of the pregnancies were located.

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Section: Discussionmentioning

confidence: 99%

A study of the genital organs of the female dromedary (Camelus dromedarius)

Elwishy

1988

Reproduction

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“…In some earlier studies, it was documented that the sterile copulation with vasectomized males was related with improved LH secretion and a higher ovulation rate in spontaneous ovulators like cattle and sheep (Marion, 1950). Other authors also revealed that ovulation occurred after intravaginal or intramuscular/intrauterine administration (Chen et al, 1985;Pan et al, 1992) of Bactrian SP to female Bactrian camels. Lately, have documented the existence of ovulation-inducing factor (OIF) in seminal plasma of alpacas and llamas that could stimulate a surge in circulation.…”

Section: Role Of Oif Among Speciesmentioning

confidence: 94%

“…It is also acted as a potent stimulator of LH secretion, and has a dose-dependent effect on ovulation rate and CL form and function. Moreover, it acts via a systemic rather than a local pathway, at physiologically relevant doses Chen et al, 1985;Sokol et al, 1985;Izumi et al, 1985;Paolicchi et al 1999).…”

Section: Advances In Animal and Veterinary Sciencesmentioning

confidence: 99%

“…The OIF in semen was recorded its existence for the first time in seminal plasma of llama and alpaca (Chen et al, 1985;.…”

Section: Advances In Animal and Veterinary Sciencesmentioning

confidence: 99%

“…It is an effective stimulator of luteinizing hormone (LH) secretion and it effects on ovulation, forming and function of the corpus luteum and acts via a systemic rather than a local pathwayat physiologically relevant doses (Ratto et al, 2006;Fernandez-Baca et al, 1970;Chen et al, 1985). Although the discovery of OIF in seminal plasma of species and categorized as induced ovulators (camel , cat and rabbit), the recent studies support the hypothesis that the OIF in seminal plasma isolated from other species which considered as spontaneous ovulators (cattle horse) (Bogle et al, 2011;Tanco et al, 2012.…”

Section: Advances In Animal and Veterinary Sciencesmentioning

confidence: 99%

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Overview of New Concepts in Induce Ovulation Triggers in Dromedary Camels

Al-Fatlawy¹,

Baiee²

2018

Adv. Anim. Vet. Sci.

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IntroductIonH ypothalamuses canpulsatile release the GnRH into the hypophyseal portal system with subsequent release of LH from the anterior pituitary into systemic circulation for inducing ovulation in mammals. The broad classification of species as either spontaneous or induced ovulators is based on the type of stimulus responsible for eliciting GnRH release from the hypothalamus (Adam et al., 2005). In spontaneously ovulating species (such as human, sheep, cattle, horse and pigs), the releasing of GnRH from the hypothalamus is triggered in the absence of progesterone and systemic estradiol concentrations exceed a threshold. In the induced ovulators (such as rabbits, ferrets, cats and camelids) the releasing of GnRH is contingent upon copulatory stimuli; hence, the ovulation is not a regular cyclic event (Bakker and Baum, 2000; Adam et al., 2005). Since a classic 1970 Peruvian study, dogma has maintained that physical stimulation of the genitalia during copulation is the primary trigger for inducing ovulation in alpacas and llamas. It is inaccurate to apply the term "oestrous cycle" in camels due to the pattern of ovulation in these animals,in contrast in spontaneous ovulators such as the cow and the mare (Bravo et al., 1990;Bravo et al., 1991).Camels are seasonally polyestrous animals with estrous cycle differed from that in other farm animals. The estrous cycle in camel is characterized by three phases lasting 24-28 days with absence of the luteal phase. These phases are including follicular growth, existence of mature follicles (estrous period) and follicular atresia. The estrous period is longer up to 8 days (Shalash, 1980;Shalash, 1987;Skidmore et al., 1996;Skidmore et al., 2009).Ovulation in the camel as in cat and rabbit occurs normally after the coitus. In these animals the neuroendocrine reflex involving the initiation of luteinising hormone release is delayed until coitus occurs . Manual stimulation of the cervix for 15 minutes in the camel did not induce ovulation but cause only partial luteinisation of the Graafian follicle, ovulation occurs 32 to 40 hours after copulation under the influence of luteinising hormone (LH) (Musa & Abu Sineina, 1978b;Wilson, 1984;Yagil, 1985). OvulatiOn induced FactOr (OiF): discOvery research ArticleAbstract | The seminal plasma consists of several components that stimulate the ovulation process. The great quantity of an ovulation-inducing factor (OIF) in seminal plasma has wide implication questions about identification, sources, mechanism of action, role among species and clinical applications in the infertility. The purpose of the current review is to focus on the current understanding of physiological and biochemical properties of seminal plasma in camelids. llamas and alpaca seminal plasma was used as agent of induced and spontaneous ovulators. Column chromatography was used to identify the ovulation-inducing factor as part of seminal plasma that stimulating hormone secretion (LH) and ovulation in llamas. OIF is β-NGF that is highly conserved. An endocrine rout...

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Llamas and Alpacas

Sumar¹

2000

Reproduction in Farm Animals

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Semen-induced ovulation in the bactrian camel (Camelus bactrianus)

Cited by 120 publications

References 4 publications

A study of the genital organs of the female dromedary (Camelus dromedarius)

A study of the genital organs of the female dromedary (Camelus dromedarius)

Overview of New Concepts in Induce Ovulation Triggers in Dromedary Camels

Llamas and Alpacas

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