RESUMO

Abstract The present study aimed to investigate the effects of a combination of progesterone with different doses of E-17β on following end points: (1) ovarian follicular dynamics and emergence of a new follicular wave, and (2) superovulatory response and embryo yield. In Experiment 1, 28 ewes were randomly divided into four groups (n = 7) to receive either 2.0 mg, 1.0 mg, 0.5 mg or none E-17β one day after insertion of a progesterone device. The different doses of estradiol similarly delayed the moment of follicular emergence (overall mean = 3.1 ± 1.0 days vs. control group = 0.86 ± 1.0 days; P < 0.01), but the emergence of the new wave showed greater synchronization with the 0.5 mg dosage of E-17β. In Experiment 2, sixty-two donor ewes received an internal progesterone release device (day -1) for 7 d and 1 d after the insertion of this device (day 0) were allocated randomly to receive 0.5 mg of E-17β or only the vehicle (control group). Superstimulation was initiated on day 3 with the administration of 133 mg of pFSH in eight decreasing doses. Contrary to expectations, the protocol with the administration of 0.5 mg E-17β did not improve the percentage of donors with > 2 CL, the number of CL and the production of embryos (P > 0.05). It was concluded that the combination of progesterone and 0.5 mg E-17β was more efficient in synchronizing the emergence of the new follicular wave, however this approach seems to be unnecessary in ewe's superovulation programs.

RESUMO

The present study aimed to investigate the effects of a combination of progesterone with different doses of E-17β on following end points: (1) ovarian follicular dynamics and emergence of a new follicular wave, and (2) superovulatory response and embryo yield. In Experiment 1, 28 ewes were randomly divided into four groups (n = 7) to receive either 2.0 mg, 1.0 mg, 0.5 mg or none E-17β one day after insertion of a progesterone device. The different doses of estradiol similarly delayed the moment of follicular emergence (overall mean = 3.1 ± 1.0 days vs. control group = 0.86 ± 1.0 days; P < 0.01), but the emergence of the new wave showed greater synchronization with the 0.5 mg dosage of E-17β. In Experiment 2, sixty-two donor ewes received an internal progesterone release device (day -1) for 7 d and 1 d after the insertion of this device (day 0) were allocated randomly to receive 0.5 mg of E-17β or only the vehicle (control group). Superstimulation was initiated on day 3 with the administration of 133 mg of pFSH in eight decreasing doses. Contrary to expectations, the protocol with the administration of 0.5 mg E-17β did not improve the percentage of donors with > 2 CL, the number of CL and the production of embryos (P > 0.05). It was concluded that the combination of progesterone and 0.5 mg E-17β was more efficient in synchronizing the emergence of the new follicular wave, however this approach seems to be unnecessary in ewes superovulation programs.(AU)

Assuntos

RESUMO

Prepubic tendon rupture may lead to the loss of pelvic floor support. A four-year-old Santa Inês ewe had been reported suffering from apathy, progressive weight loss throughout ten days, and prolonged pregnancy. Physical exams showed an excessive pendulous abdomen, a mild ventral edema between the udder and the umbilical scar (xiphoid region). Also, the udder was cranially displaced and with hematomas. Other symptoms noticed were walking reluctance, pelvic asymmetry, tachycardia, and tachypnea. The urinalysis findings indicated the presence of ketone bodies. The ultrasound examination confirmed the presence of fetuses with normal development, and a potential rupture of the abdominal muscles was excluded. Eight days following its hospitalization, labor induction was carried out using dexamethasone (20mg, IM, single application). She went into labor three days after the initial dose of corticosteroid. The ewe had difficulty expelling the lambs, making their traction necessary. Although the animal has recovered from its injuries, the clinical picture shows prepubic tendon rupture, and in order to prevent future complications, the ewe is not going to breed anymore. The report of this case works as an alert to the possibility of the occurrence of this affection in ewes and demonstrates the need of parturition assistance in animals with this condition, which can be diagnosed through clinical evaluation and ultrasound examination.(AU)

A ruptura do tendão pré-púbico resulta na perda do suporte do assoalho abdominal do animal. Uma ovelha, prenhe, da raça Santa Inês, de quatro anos, foi atendida com apatia e emagrecimento progressivo há dez dias e prolongamento da gestação. Ao exame clínico, verificou-se abdômen demasiadamente penduloso, discreto edema ventral entre o úbere e a região xifóide, úbere penduloso e com feridas, dificuldade de locomoção, assimetria de pelve, taquicardia e taquipneia. Detectou-se, na urinálise presença de corpos cetônicos. Foi confirmada à ultrassonografia, a viabilidade dos fetos. O parto foi induzido após oito dias de internação. Após três dias da aplicação do corticoide a ovelha entrou em trabalho de parto, sendo necessárias manobras obstétricas para retirada dos fetos, pois a mesma não apresentava contrações abdominais. O paciente se recuperou, mas como o quadro clínico era compatível com ruptura do tendão prépúbico, foi recomendado a retirada do animal da reprodução para evitar problemas futuros à ovelha e aos cordeiros. Conclui-se que o acompanhamento gestacional é indispensável para animais com esta afecção e que mediante avaliação clínica e ultrassonografia, pode-se chegar ao diagnóstico dessa afecção.(AU)

Assuntos

RESUMO

Prepubic tendon rupture may lead to the loss of pelvic floor support. A four-year-old Santa Inês ewe had been reported suffering from apathy, progressive weight loss throughout ten days, and prolonged pregnancy. Physical exams showed an excessive pendulous abdomen, a mild ventral edema between the udder and the umbilical scar (xiphoid region). Also, the udder was cranially displaced and with hematomas. Other symptoms noticed were walking reluctance, pelvic asymmetry, tachycardia, and tachypnea. The urinalysis findings indicated the presence of ketone bodies. The ultrasound examination confirmed the presence of fetuses with normal development, and a potential rupture of the abdominal muscles was excluded. Eight days following its hospitalization, labor induction was carried out using dexamethasone (20mg, IM, single application). She went into labor three days after the initial dose of corticosteroid. The ewe had difficulty expelling the lambs, making their traction necessary. Although the animal has recovered from its injuries, the clinical picture shows prepubic tendon rupture, and in order to prevent future complications, the ewe is not going to breed anymore. The report of this case works as an alert to the possibility of the occurrence of this affection in ewes and demonstrates the need of parturition assistance in animals with this condition, which can be diagnosed through clinical evaluation and ultrasound examination.

A ruptura do tendão pré-púbico resulta na perda do suporte do assoalho abdominal do animal. Uma ovelha, prenhe, da raça Santa Inês, de quatro anos, foi atendida com apatia e emagrecimento progressivo há dez dias e prolongamento da gestação. Ao exame clínico, verificou-se abdômen demasiadamente penduloso, discreto edema ventral entre o úbere e a região xifóide, úbere penduloso e com feridas, dificuldade de locomoção, assimetria de pelve, taquicardia e taquipneia. Detectou-se, na urinálise presença de corpos cetônicos. Foi confirmada à ultrassonografia, a viabilidade dos fetos. O parto foi induzido após oito dias de internação. Após três dias da aplicação do corticoide a ovelha entrou em trabalho de parto, sendo necessárias manobras obstétricas para retirada dos fetos, pois a mesma não apresentava contrações abdominais. O paciente se recuperou, mas como o quadro clínico era compatível com ruptura do tendão prépúbico, foi recomendado a retirada do animal da reprodução para evitar problemas futuros à ovelha e aos cordeiros. Conclui-se que o acompanhamento gestacional é indispensável para animais com esta afecção e que mediante avaliação clínica e ultrassonografia, pode-se chegar ao diagnóstico dessa afecção.

Assuntos