Antiluteolytic strategies to improve fertility in cattle

Binelli, Mário; Thatcher, W.W.; Mattos, R.C.; Baruselli, Pietro Sampaio

doi:10.1016/s0093-691x(01)00646-x

Cited by 153 publications

(142 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…According to Binelli et al (2001), obtaining greater corpora lutea in receptors may increase the pregnancy rate in embryo transfer programs; however, Spell et al (2001) showed that the fluctuation of P4 reflects a combination of different rates of development of the corpus luteum and secretion of P4 during the early stages of the estrous cycle. Looney et al (2006) indicate that corpora lutea of at least 10 mm are acceptable for embryo recipients to become suitable for embryo transfer.…”

Section: Resultsmentioning

confidence: 99%

“…However, the use of corpus luteum with cavity has generated controversy (Grygar et al, 1997;Marques et al, 2002;Looney et al, 2006, Siqueira et al, 2009a. Baruselli et al (2001) found increase in the concentration of P4 in accordance with the corpus luteum increase in crossbred recipients and according to Binelli et al (2001), larger corpus luteum in recipients may increase pregnancy rates in embryo transfer programs. However, Nogueira et al (2004) found an opposite result, in which recipients that received doses of 400 and 600 IU of equine chorionic gonadotrophin showed higher concentrations of P4 and higher corpus luteum, but lower pregnancy rates than those not treated or given 200 IU of equine chorionic gonadotrophin.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of breed and corpus luteum on pregnancy rate of bovine embryo recipients

et al. 2012

View full text Add to dashboard Cite

-The objective of this study was to evaluate pregnancy rates of recipients of different breed groups (Nellore and crossbreed), as well as the effects of size and type of the corpus luteum (CL) on plasmatic concentrations of progesterone and pregnancy rates of embryo recipients. A total of 152 heifers were synchronized with progesterone implants and on the day of embryo transfer, previously obtained by superovulation and frozen in ethylene glycol, the diameter and type of the corpus luteum (cavitary and compact) was measured and blood was collected for progesterone measurement. The pregnancy rate was 44.1%, with a diameter of corpus luteum higher in recipients that became pregnant (2.03±0.41) compared with nonpregnant ones (1.86±0.34 cm). Plasmatic concentrations of progesterone did not differ between pregnant (1.50±1.05) and non-pregnant (1.31±0.91 ng/mL) animals. The type of corpus luteum did not influence the pregnancy rates. Only Angus and crossbred Marchigiana differ among themselves in pregnancy rates (33.3 and 59.2%, respectively). The pregnancy probability was affected only by CL diameter, but not by P4 plasmatic concentration. Selection of the corpus luteum size at the time of embryo transfer is an important factor to increase pregnancy rates in recipients, and compact and cavitary corpora lutea do not influence the pregnancy rates of bovine embryo recipients. Nellore recipients have pregnancy rates that are satisfactory and comparable to crossbred (Bos taurus × Bos indicus) recipients.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of breed and corpus luteum on pregnancy rate of bovine embryo recipients

et al. 2012

View full text Add to dashboard Cite

show abstract

“…In cattle, there are some factors that may contribute to the reduction of fertility, such as postpartum anestrus, low nutritional status (Bó et al, 2001) and low plasma concentrations of progesterone (Binelli et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Reproductive parameters of Sindhi cows (Bos taurus indicus) treated with two ovulation synchronization protocols

Mello

Ferreira

et al. 2013

R. Bras. Zootec.

View full text Add to dashboard Cite

-The objective of this study was to evaluate the reproductive parameters of Sindhi cows aiming to improve the efficiency of fixed-time artificial insemination protocols in this breed. For this purpose, sixteen Sindhi cows were divided into two groups: in group I (EB, n = 8) animals received an intravaginal P4 implant and an application of 2 mg of estradiol benzoate on day 0. On day 8 the implant was removed and 10 mg of Dinoprost were applied; on day 9, 1 mg of estradiol benzoate was applied, and animals were fixed-time artificially inseminated 36 hours later; in group II (EB + eCG, n = 8) animals were subjected to same treatment, and on day eight 400 IU of eCG were applied. From day 0 animals were examined daily by a trans-rectal ultrasound device, where in each assessment the largest follicles of each day were measured. The reproductive parameters observed for groups I and II were: emergence of follicular wave, 4.5±1.4 and 3.8±0.3 days; interval between wave emergence and ovulation, 5.8±1.4 and 7.1±0.3 days; interval between wave emergence and implant removal, 3.5±1.4 and 4.1±0.3 days; interval between implant removal and ovulation, 74.0±11.8 and 82.5±4.2 hours; diameter of the dominant follicle (DF) at the time of implant removal, 7.5±2.5 and 6.6±1.5 mm; maximum diameter of DF, 10.47±8.85 and 3.7±1.2 mm; growth rate of DF, 0.90±0.83 and 0.7±0.6 mm/day; ovulation rate, 75% and 100%; and pregnancy rate, 0% and 50%, respectively. There was no significant difference between the groups. We observed that eCG was not efficient in improving the reproductive parameters analyzed in this breed.

show abstract

“…Efeitos na sincronização da ovulação foram relatados por Vasconcelos et al (1994) (BINELLI et al, 2001(BINELLI et al, , 2004GOFF, 2002).…”

Section: Folha De Avaliaçãounclassified

“…O interferon-tau (IFN-T) secretado pelo concepto por via parácrina é o principal regulador do processo antiluteolítico, bloqueando a secreção de PGF 2α pelo endométrio (BINELLI et al, 2001(BINELLI et al, , 2004. Meyer et al (1995) …”

Section: Folha De Avaliaçãounclassified

Emprego de um novo dispositivo intravaginal para liberação sustentada de progesterona em programas de TETF em receptoras de embrião (Bos taurus taurus x Bos taurus indicus)

Pardo¹

View full text Add to dashboard Cite

Antiluteolytic strategies to improve fertility in cattle

Cited by 153 publications

References 38 publications

Effect of breed and corpus luteum on pregnancy rate of bovine embryo recipients

Effect of breed and corpus luteum on pregnancy rate of bovine embryo recipients

Reproductive parameters of Sindhi cows (Bos taurus indicus) treated with two ovulation synchronization protocols

Emprego de um novo dispositivo intravaginal para liberação sustentada de progesterona em programas de TETF em receptoras de embrião (Bos taurus taurus x Bos taurus indicus)

Contact Info

Product

Resources

About