Superovulation in Cattle

Mapletoft, R.J.; Bó, G. A.

doi:10.1002/9781118833971.ch75

Cited by 9 publications

(9 citation statements)

References 62 publications

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“…Further causes for this could also be related to either the animal itself or the environment. These may include nutritional status, reproductive history, age, season, breed, effects of repeated superovulations and ovarian status at the time of treatment [8].…”

Section: Introductionmentioning

confidence: 99%

“…Looney et al [11] described that recombinant bovine FSH induces high responses to superovulation without the supplementation of exogenous LH. These results propose that LH is not necessary for the bovine superovulation protocol and that the quality of embryos may be higher if only FSH is used [8]. After introduction of prostaglandin F2α (PGF-2α) in the 1970s, superovulatory treatments usually start between day 8 and 12 of the estrus cycle [12,13], corresponding to the period of the second follicular wave emergence in cows that have two or three waves during the cycle [14,15].…”

Section: Introductionmentioning

confidence: 99%

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Improvement of Embryo Recovery in Holstein Cows Treated by Intra-Ovarian Platelet Rich Plasma before Superovulation

Crémonesi

Bonfanti

Idda

et al. 2020

Veterinary Sciences

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The current research was designed to evaluate if intra-ovarian administration of autologous platelet rich plasma (PRP) before superovulation could increase the number of follicles responsive to gonadotropin treatment in order to improve embryo recovery in donor cows. Eight Holstein-Friesian cows of proven fertility were employed. After estrous synchronization, at the 18th day of diestrous, the right ovary of each cow was left untreated and served as control while the left ovary was inoculated with 5 mL of PRP. Cows were left to spontaneously return to estrous, and nine days later, a standard superovulation was initiated for every cow. Seven days after artificial insemination (AI), putative embryos were collected by flushing the right and left uterine horns separately. All statistics were calculated by ANOVA. The mean number of follicles, evaluated by transrectal ultrasound scanning, did not statistically differ before PRP treatment between right (control) and left (treated) ovaries (9.18 ± 1.35 and 7.32 ± 1.67, p = 0.28, respectively) as well as at 48 h after PRP injection (7.67 ± 2.52 and 8.00 ± 2.00, p = 0.73, respectively). A statistical (p = 0.023) difference was found in the average number of follicles at the last gonadotropin injection between control and treated ovaries (11.33 ± 2.89 and 20.00 ± 9.17, respectively). The statistically different (p = 0.0037) number of grade 1-2 blastocysts harvested from the uterine horn ipsilateral to control ovaries in comparison to that collected from the treated ones (6.63 ± 2.92 and 14.75 ± 5.92, respectively) suggests that intra-ovarian injection of PRP before superovulation could exert beneficial effects both in latent follicle growth and in vivo embryo production.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improvement of Embryo Recovery in Holstein Cows Treated by Intra-Ovarian Platelet Rich Plasma before Superovulation

Crémonesi

Bonfanti

Idda

et al. 2020

Veterinary Sciences

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“…Further, ovarian response is related with differences in treatments such as total dose, duration and timing of treatment and the use of additional hormones in the treatment protocol (Son et al 2007) [26] . Additional factors for the differences in ovarian response might also be the genetic of the animal and its environment, dietary intake (Yaakub et al 1999) [33] , breed (Alvarez et al 2010 [2] : Tasdemir et al 2011 [29] ), season (Mapletoft and Bo, 2014) [13] , age (Da Costa et al 2001) [6] , ovarian status at the time of the treatment (Bader et al 2005 [3] : Durocher et al 2006 [8] ) and the effects of repeated superstimulations (Malhi et al 2006) [12] . Though Bos Indicus breeds have greater sensitivity to exogenous gonadotropins, the mean lesser number of follicles in Bos Indicus than exotic breeds recorded in this study is akin to the findings of Baruselli et al (2006) [5] , Veerabramhaiah et al (2012) [31] and Reddy et al (2018) [22] .…”

Section: Resultsmentioning

confidence: 99%

Effect of FSH dose on the super ovulatory response in Punganur Cows

et al. 2024

Int. J. Adv. Biochem. Res.

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The study was aimed to evaluate the super ovulatory response in Punganur cows by using low doses of FSH wherein donor cows were treated with 160 and 200 mg of Folltropin ® V to assess the ovarian response, follicular development, total number of ovulations per animal, embryos recovered, and concentrations of estrogen at different stages of the treatment. The results indicated that 200 mg FSHp has significantly higher ovarian response with a greater number of follicles per animal, but with no significant difference in total number of ovulations, embryos recovered, and viable embryos between groups. The concentration of estrogen was significant among different treatment days within each group, but with no significant difference between groups. However, a negative correlation was observed between the concentration of estrogen on the day of initiation of superovulation with number of ovulations and embryos collected indicating an inverse relationship. In conclusion, super ovulatory response, follicular growth, and embryo recovery rate was superior with 200 mg compared to 160 mg FSH.

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“…Cows were subjected to a conventional estrus synchronization and superovulatory protocol (Figure 1) similar to those described by Mapletoft and Bo (2014) [24]. This consisted of a combination of progesterone, estradiol, prostaglandinF2α and gonadotropinreleasing hormone (GnRH).…”

Section: Synchronization Of Estrus and Superovulationmentioning

confidence: 99%

Effects of Mixed Pasture Legume Phytoestrogens on Superovulatory Response and Embryo Quality in Angus Cows

Wyse,

Nevard,

Loy

et al. 2024

Animals

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Ovulation and artificial insemination rates have been observed to decrease in sheep and cows when exposed to dietary phytoestrogens at concentrations greater than 25 mg/kg DM. A grazing trial was undertaken to investigate the effects of coumestrol and other key phytoestrogens on the superovulatory response, embryo numbers and quality in beef cows grazing legume pastures. A 7-week controlled grazing trial was conducted with legume and ryegrass pasture treatments, with cows exposed to legumes at two timed treatments, 4 and 7 weeks. Twenty Angus cows were subjected to a conventional estrus synchronization and superovulation protocol. Embryos were recovered via conventional uterine body flushing 7 days post artificial insemination (AI). Numerous phytoestrogens were identified in both pasture and plasma samples, including coumestrol and formononetin. Concentrations of phytoestrogens in the pasture ranged from 0.001 to 47.5 mg/kg DM and 0 to 2.6 ng/mL in plasma. Approximately 50% of cows produced viable embryos 7 days post AI. A significant interaction between the effect of treatment groups on the embryo stage was observed (p < 0.05). The results suggest that concentrations of >25 mg/kg DM of phytoestrogens less than 20 days preceding AI may negatively affect oocyte developmental competence, reduce progesterone production and thus contribute to early embryonic loss.

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Superovulation in Cattle

Cited by 9 publications

References 62 publications

Improvement of Embryo Recovery in Holstein Cows Treated by Intra-Ovarian Platelet Rich Plasma before Superovulation

Improvement of Embryo Recovery in Holstein Cows Treated by Intra-Ovarian Platelet Rich Plasma before Superovulation

Effect of FSH dose on the super ovulatory response in Punganur Cows

Effects of Mixed Pasture Legume Phytoestrogens on Superovulatory Response and Embryo Quality in Angus Cows

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