Pregnancy rate in Bulgarian White milk goats with natural and synchronized estrus after artificial insemination by frozen semen during breeding season

Yotov, S.; Velislavova, D.; Dimova, Lora R.

doi:10.1016/j.apjr.2016.01.011

Cited by 21 publications

(17 citation statements)

References 25 publications

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“…The pregnancy rate in naturally bred goats was higher than AI goats. The pregnancy rate and number of newly born kids are the most important indicators with which to evaluate reproductive performance in animal agriculture (Yotov et al, 2016). The calculated pregnancy rate in naturally bred goat groups was higher than the 85.7 % recorded by Fonseca et al (2005) in Alpine goats treated with intravaginal sponges (MAP, 60 mg) for 9 days plus 200 IU eCG and 22.5 µg d-cloprostenol 24 h before sponge removal and similar to the 93.44 % reported by Duričić et al (2012) in Boer goats reared in a semi-intensive environment in Croatia.…”

Section: Resultsmentioning

confidence: 99%

“…Optimal reproductive performance in goats is an important trait, which affects the economic profitability of farms (Yotov et al, 2016). Goat reproduction can be controlled using recently developed methods known as assisted reproductive technologies.…”

Section: Introductionmentioning

confidence: 99%

“…These methodologies enable accelerated production of genetically valuable offspring and improve reproductive performance. Nevertheless, the effectiveness of AI with frozen semen in achieving satisfactory pregnancy rates in goats remains unknown (Yotov et al, 2016). Different factors including the type of extender, interactions between cryoprotectants, cooling rate, thawing rate, and the physiological status of animals are important for successful semen cryopreservation and AI.…”

Section: Introductionmentioning

confidence: 99%

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The effects of natural mating and artificial insemination using cryopreserved buck semen on reproductive performance in Alpine goats

Agossou

Koluman

2018

Arch. Anim. Breed.

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This study compared the effects of natural mating and artificial insemination using frozen buck semen on reproductive performance in Alpine goats. Sixty reproductive Alpine goats were grouped according to natural mating (n = 30) and artificial insemination (n = 30) breeding methods. Oestrus was synchronised in experimental goats using a vaginal sponge impregnated with 20 mg of progestogen FGA (fluorogestone acetate) for 11 days. At the time of sponge insertion, 150 µg of prostaglandin F 2α (PGF 2α ) analogue was injected intramuscularly. Forty-eight hours prior to vaginal sponge withdrawal, 500 IU equine chorionic gonadotropin (eCG) was injected into the animals. At the end of synchronisation protocol, goats were fertilised using frozen semen or mated with a well-performing buck (ratio: 1 male to 5 females). The pregnancy (pregnant/synchronised goats) and mortality rates (P < 0.05) were higher (93 % vs. 70 %; 2 % vs. 4 %) in the naturally mated goats than the artificially inseminated group. Kids' live weight at birth was similar (3.83 ± 0.23 and 3.15 ± 0.11 kg) in both groups. The oestrus synchronisation followed by natural mating achieved better reproductive performance than the goats artificially inseminated using frozen semen. However, the artificially inseminated animals displayed an acceptable twinning rate.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The effects of natural mating and artificial insemination using cryopreserved buck semen on reproductive performance in Alpine goats

Agossou

Koluman

2018

Arch. Anim. Breed.

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“…In many cases, the use of the standard technique results in deposition of the semen in the cervix if all the cervical rings cannot be passed. Under controlled conditions, pregnancy rates following the use of the standard technique are low, typically in the range of 20-30% [41][42][43][44].…”

Section: Standard Ai Methods (Tube Speculum)mentioning

confidence: 99%

Reproduction in Goats

Sánchez-Dávila¹,

González²,

Barragán³

2018

Goat Science

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Reproductive activity of the goat begins when the females reach puberty, which happens at 5 months of age. The ovarian or estrous cycle is the period between two consecutive estrus. It is also the time that lasts the development of the follicle in the ovary, until rupture occurs and ovulation takes place, which coincides with the appearance of estrus. This chapter will describe the physiological and endocrinological bases of estrus in the goat. Likewise, factors affecting the presence of estrus and ovulation will be described. At another point, synchronization of estrus and ovulation, factors affecting the presence of estrus and external symptoms of estrus, will be described.To achieve synchronization of estrus or induction of ovulation within or outside the breeding season, it may be necessary to manage light hours, male effect, and/or use of hormones. The importance of artificial insemination is described, as well as the current situation of this technique worldwide. Currently, the techniques of artificial insemination in goats have been limited worldwide, due to the lack of resources of producers and trained technicians. The techniques of artificial insemination with estrous synchronization programs and ovulation with current research results will be described.

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“…In addition, in a study conducted in Gurcu bucks, fresh and post-thawing spermatological parameters have been reported to vary depending on the season [6] . Of course, in chilled semen, problems like decreased motility, deterioration of structural integrity, decreased fertility and increased embryonic losses can occur [7] . However, all these complications due to spermatozoa damage are less than frozen semen.…”

Section: Introductionmentioning

confidence: 99%

Sığır Serum Albumin (BSA) Katkılı Sulandırıcının +4°C’de Saklanan Saanen Teke Spermasının Spermatolojik Özellikleri Üzerine Etkileri

Sandal¹,

Şenlikçi²,

Baran³

et al. 2020

Kafkas Univ Vet Fak Derg

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Pregnancy rate in Bulgarian White milk goats with natural and synchronized estrus after artificial insemination by frozen semen during breeding season

Cited by 21 publications

References 25 publications

The effects of natural mating and artificial insemination using cryopreserved buck semen on reproductive performance in Alpine goats

The effects of natural mating and artificial insemination using cryopreserved buck semen on reproductive performance in Alpine goats

Reproduction in Goats

Sığır Serum Albumin (BSA) Katkılı Sulandırıcının +4°C’de Saklanan Saanen Teke Spermasının Spermatolojik Özellikleri Üzerine Etkileri

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