Effect of pretreatment with bovine somatotropin (bST) and/or gonadotropin-releasing hormone (GnRH) on conception rate of dairy cows with ovarian cysts subjected to synchronization of ovulation and timed insemination

Bartolome, J.A.; Hernández, Joel Alberto Vargas; Sheerin, P.; Luznar, S.; Kelbert, D.; Thatcher, W.W.; Archbald, L.F.

doi:10.1016/s0093-691x(02)01286-4

Cited by 11 publications

(8 citation statements)

References 18 publications

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“…In order to suppress recurrences of ovarian cysts after treatment with GnRH and PG-F2α, ovulation should be induced with GnRH or hCG again. Studies confirm the high effectiveness of this program in the treatment of ovarian cysts in cows [26][27][28]. PGF2α is also used in the therapy of lutein cysts, where its administration results in luteolysis of cysts and reduction of high levels of progesterone.…”

Section: Ovarian Cysts Diagnostic and Treatment In Mammalsmentioning

confidence: 71%

Pathogenesis and pathophysiology of ovarian follicular cysts in mammals

Rybska

Knap

Jankowski

et al. 2018

Medical Journal of Cell Biology

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Ovarian cysts remain to be one of the most common and serious problems in reproduction of farm animals, as well as humans. Apart from causing the fall in reproductive potential of the ovaries, occupying the place in which folliculogenesis and oogenesis occur, they also cause hormone imbalances, by preventing corpus luteum formation, hence lowering the amount of steroid hormone production. While singular cysts rarely affect fertility, hormone fluctuations that are associated with their presence promotes their multiplication, which usually has more adverse effects. While the cysts are easily detectable in humans, possessing distinct echography while examined by ultrasound, multiple factors prevent widespread use of effective detection methods among large herds of farm animals. Because of lack of noticeable symptoms of early stages of such malignancies, they rarely get detected before the animal stops to exhibit symptoms of heat. That causes scientific research to be focused on not only methods of detection, but also the ways to negate the effects of ovarian cysts and bring the affected specimen back to reproductive potential. Despite that, high costs of diagnosis and treatment, cause them to be uncommon on commercial farms. As lack of fertility eliminates animals from breeding purposed herds, ovarian cysts persist as a cause of large losses of the animal husbandry business. Continuous research, focused on natural examples of ovarian cysts should be conducted, in order to improve methods of detection, prevention, treatment and recovery from the effects of ovarian cysts.

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Section: Ovarian Cysts Diagnostic and Treatment In Mammalsmentioning

confidence: 71%

Pathogenesis and pathophysiology of ovarian follicular cysts in mammals

Rybska

Knap

Jankowski

et al. 2018

Medical Journal of Cell Biology

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“…Reused-CIDR was not associated with improvement in P/AI (P = 0.93 and 0.79 for P/AI 30 and P/AI 70, respectively). RG-Ovsynch had a longer diagnosis-to-FTAI interval (median 24, IQR 17,31). The dominant ovarian structures and the presence of a cyst or a luteal structure at PGF 2α administration or at insemination were not associated with…”

Section: Introductionmentioning

confidence: 94%

“…The suboptimal performance of the Ovsynch in anovular cows is thought to occur because the new synchronized follicular wave that emerges after the first GnRH treatment of the Ovsynch develops and matures under a low progesterone level [25,29,30]. To mitigate this, cows with ovarian cysts have been pre-treated with GnRH 6 to7 days (Pre-GnRH) before initiating the Ovsynch [31,32]. Pre-GnRH treatment has been found to improve the pregnancy per artificial insemination (P/AI) in one study [32], however, another study reported reduced P/AI following treatment with Pre-GnRH [31].…”

Section: Introductionmentioning

confidence: 99%

Efficacy of ovulation synchronization with timed artificial insemination in treatment of follicular cysts in dairy cows

2020

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“…The Ovsynch protocol, designed for fixed-time artificial insemination (AI), has been used successfully in oestrus synchronization programmes and ovulation (Hanzen et al, 2003a; In experiments with a large dairy herd (3000 lactating cows) in Florida, a similar gestation rate (approximately 27%) was reported using this protocol in cycling cows and cystic cows (Bartolome et al, 2003). In another experiment that compared cyst aspiration and hormone treatment, cows that underwent cyst puncture followed by treatment with xx GnRH and PGF 2α had better recovery rates compared to those undergoing the puncture or hormone treatment only (Amiridis, 2009).…”

Section: B) Gnrhmentioning

confidence: 99%

Ovarian cysts in cattle

et al. 2021

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Ovarian cysts (OC) are one of the major factors affecting the fertility of dairy cattle due to their negative effects on reproductive performances, causing great economic losses. They have been traditionally defined as anovulatory follicular structures with a diameter exceeding 20 or 25 mm, lasting at least 10 days on the ovary in the absence of a functional corpus luteum. However, in recent years, the development of ovarian ultrasound and hormonal assays, particularly progesterone (P4), have provided additional information, thus changing the definition of this disease. These methods were proposed as the most effective combination for the diagnosis of OC. Treatments are primarily based on the use of different hormones or hormonal associations. Particularly, the standard treatment is GnRH. PGF2α is very effective in the case of luteal cyst. However, treatment failures observed with commonly administered hormones require the use of second-line treatments. Therefore, the Ovsynch protocol and progestogen appear to be a possible alternative in OC treatment. In order to prevent OC formation and to reduce OC incidence, strategies should focus on reducing diseases and stress and optimizing food intake during dry-off and post-partum (PP) periods. Medical prevention has been proposed with the same substances commonly used in treatment (GnRH, PGF2α).

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Effect of pretreatment with bovine somatotropin (bST) and/or gonadotropin-releasing hormone (GnRH) on conception rate of dairy cows with ovarian cysts subjected to synchronization of ovulation and timed insemination

Cited by 11 publications

References 18 publications

Pathogenesis and pathophysiology of ovarian follicular cysts in mammals

Pathogenesis and pathophysiology of ovarian follicular cysts in mammals

Efficacy of ovulation synchronization with timed artificial insemination in treatment of follicular cysts in dairy cows

Ovarian cysts in cattle

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