The ovarian and uterine responses of Baixadeiro mares to prostaglandin synchronization during the dry and rainy seasons.

This study aimed to evaluate the effect of synchronization with prostaglandin F2α in Baixadeiro mares during the rainy and dry seasons. Fourteen mares were synchronized by administering two doses of 1 mL prostaglandin PGF 2α and monitored by rectal palpation and ultrasound for the assessment of follicular development and uterine echotexture. Of this total, nine mares allowed the collection of blood, in which the blood was collected by venipuncture of the jugular vein to determine progesterone (P4) by ELISA. Mares showed no differences (P > 0.05) in weight, body score condition (BSC), tone, uterine edema, frequency of ovulation, synchronization interval, estrus, and the total number of follicles between periods. However, there was a difference in large increased follicle diameter (P < 0.05) during the dry season. The average concentrations of P4 in mares differed (P < 0.05) between the pre- and post-ovulatory phases for both seasons and after ovulation, with higher concentrations in the rainy season. Furthermore, statistical differences in daily light (P < 0.05) were observed between the dry and rainy periods. Thus, we conclude that mares from the genetic grouping Baixadeiro showed no reproductive seasonality, though there was a difference in luminosity between the rainy and dry seasons. The treatment with two doses of PGF 2α was effective in synchronizing the mares, promoting the return of estrus in the dry and rainy periods. The mares remaining cyclically active throughout the year provided there were appropriate forage availability and quality levels to allow for normal values of body weight and condition.

The ovarian and uterine responses of Baixadeiro mares to prostaglandin synchronization during the dry and rainy seasons

This study aimed to evaluate the effect of synchronization with prostaglandin F2α in Baixadeiro mares during the rainy and dry seasons. Fourteen mares were synchronized by administering two doses of 1 mL prostaglandin PGF 2α and monitored by rectal palpation and ultrasound for the assessment of follicular development and uterine echotexture. Of this total, nine mares allowed the collection of blood, in which the blood was collected by venipuncture of the jugular vein to determine progesterone (P4) by ELISA. Mares showed no differences (P > 0.05) in weight, body score condition (BSC), tone, uterine edema, frequency of ovulation, synchronization interval, estrus, and the total number of follicles between periods. However, there was a difference in large increased follicle diameter (P < 0.05) during the dry season. The average concentrations of P4 in mares differed (P < 0.05) between the pre- and post-ovulatory phases for both seasons and after ovulation, with higher concentrations in the rainy season. Furthermore, statistical differences in daily light (P < 0.05) were observed between the dry and rainy periods. Thus, we conclude that mares from the genetic grouping Baixadeiro showed no reproductive seasonality, though there was a difference in luminosity between the rainy and dry seasons. The treatment with two doses of PGF 2α was effective in synchronizing the mares, promoting the return of estrus in the dry and rainy periods. The mares remaining cyclically active throughout the year provided there were appropriate forage availability and quality levels to allow for normal values of body weight and condition.(AU)

The ovarian and uterine responses of Baixadeiro mares to prostaglandin synchronization during the dry and rainy seasons

Abstract This study aimed to evaluate the effect of synchronization with prostaglandin F2α in Baixadeiro mares during the rainy and dry seasons. Fourteen mares were synchronized by administering two doses of 1 mL prostaglandin PGF 2α and monitored by rectal palpation and ultrasound for the assessment of follicular development and uterine echotexture. Of this total, nine mares allowed the collection of blood, in which the blood was collected by venipuncture of the jugular vein to determine progesterone (P4) by ELISA. Mares showed no differences (P > 0.05) in weight, body score condition (BSC), tone, uterine edema, frequency of ovulation, synchronization interval, estrus, and the total number of follicles between periods. However, there was a difference in large increased follicle diameter (P < 0.05) during the dry season. The average concentrations of P4 in mares differed (P < 0.05) between the pre- and post-ovulatory phases for both seasons and after ovulation, with higher concentrations in the rainy season. Furthermore, statistical differences in daily light (P < 0.05) were observed between the dry and rainy periods. Thus, we conclude that mares from the genetic grouping Baixadeiro showed no reproductive seasonality, though there was a difference in luminosity between the rainy and dry seasons. The treatment with two doses of PGF 2α was effective in synchronizing the mares, promoting the return of estrus in the dry and rainy periods. The mares remaining cyclically active throughout the year provided there were appropriate forage availability and quality levels to allow for normal values of body weight and condition.

The ovarian and uterine responses of Baixadeiro mares to prostaglandin synchronization during the dry and rainy seasons

This study aimed to evaluate the effect of synchronization with prostaglandin F2α in Baixadeiro mares during the rainy and dry seasons. Fourteen mares were synchronized by administering two doses of 1 mL prostaglandin PGF 2α and monitored by rectal palpation and ultrasound for the assessment of follicular development and uterine echotexture. Of this total, nine mares allowed the collection of blood, in which the blood was collected by venipuncture of the jugular vein to determine progesterone (P4) by ELISA. Mares showed no differences (P > 0.05) in weight, body score condition (BSC), tone, uterine edema, frequency of ovulation, synchronization interval, estrus, and the total number of follicles between periods. However, there was a difference in large increased follicle diameter (P < 0.05) during the dry season. The average concentrations of P4 in mares differed (P < 0.05) between the pre- and post-ovulatory phases for both seasons and after ovulation, with higher concentrations in the rainy season. Furthermore, statistical differences in daily light (P < 0.05) were observed between the dry and rainy periods. Thus, we conclude that mares from the genetic grouping Baixadeiro showed no reproductive seasonality, though there was a difference in luminosity between the rainy and dry seasons. The treatment with two doses of PGF 2α was effective in synchronizing the mares, promoting the return of estrus in the dry and rainy periods. The mares remaining cyclically active throughout the year provided there were appropriate forage availability and quality levels to allow for normal values of body weight and condition.

Características de morfoecogenicidade uterina e de corpo lúteo e suas relações com os níveis de plasmáticos de progesterona em éguas “baixadeiro” / Characteristics of morphoechogenicity and uterine corpus luteum and its relations with the plasma levels of progesterone in baixadeiro mares / Características de morfoecogenicidad uterino y del cuerpo luteo y sus relaciones con niveles plasmáticos de progesterona en yegua "baixadeiro"

El objetivo de este trabajo fue caracterizar los aspectos de morfoecogenicidad uterina y cuerpo lúteo (CL) y la relación con las concentraciones de progesterona (P4) en yeguas Baixadeiro, durante los períodos lluvioso y seco. Se utilizaron nueve animales, sincronizados con dos dosis de prostaglandina sintética análoga PGF2a, con un intervalo de 10 días y monitorizados mediante palpación transrectal y ecografía cada 48 horas. La ecogenicidad uterina se determinó por el grado de edema y la del CL se clasificó según la organización glandular. La sangre se recogió mediante punción de la vena yugular para determinar las concentraciones de P4 utilizando el método ELISA. El índice de precipitación no mostró diferencia estadística (p <0,05). La tasa de luminosidad difirió entre los períodos (p <0,05). El peso y la CEC no difirieron entre períodos (p <0,05). Entre las yeguas, 88,89% (8/9) ovularon en época de lluvias y 55,56% (5/9) ovularon en época seca, sin diferencia estadística (p <0,05). En cuanto a la morfocogenicidad uterina, no hubo diferencia significativa entre períodos (p< 0,05). Hubo diferencia entre períodos (p> 0,05) para los niveles plasmáticos de P4, con mayor concentración en la época de lluvias. En cuanto a la morfoecogenicidad de CL, se presentaron de centro anecogénico a hiperecogénico. Así, las yeguas del grupo genético...(AU)

The aim of this study was to characterize the aspects of uterine morphology and corpus luteum (CL) and the relationship with progesterone concentrations (P4) of the "Baixadeiro" mares during the rainy and dry periods. Nine animals, synchronized with two doses of prostaglandin PGF2a synthetic analogue, were used at intervals of 10 days and monitored by transrectal palpation and ultrasonography every 48 hours. The uterine echogenicity was determined by the degree of edema and the CL was classified for glandular organization. Blood was collected by jugular vein puncture to determine P4 concentrations by the ELISA method. The rainfall index did not present statistical difference (p <0,05). The luminosity rate differed between the periods (p < 0,05). Weight and ECC did not differ between the periods (p < 0,05). Among the mares, 88,89% (8/9) ovulated in the rainy season while 55,56% (5/9) ovulated in the dry period, with no statistical difference (p < 0,05). As to uterine morphoecogenicity, there was no significant difference between the periods (p < 0,05). There was a difference between periods (p > 0,05) for plasma P4 levels, with the highest concentration during the rainy season. As for the morfoecogenicity of CL, these presented from anechoic center to hyperechogenic. Thus, the mares of the genetic group "Baixadeiro" remained cyclical...(AU)

O objetivo com este trabalho foi caracterizar os aspectos de morfoecogenicidade uterina e de corpo lúteo (CL) e a relação com as concentrações de progesterona (P4) em éguas Baixadeiro, durante os períodos chuvoso e seco. Foram utilizados nove animais, sincronizados com duas doses de análogo sintético de prostaglandina PGF2a, com intervalo de 10 dias e monitorados por palpação transretal e ultrassonografia a cada 48 horas. A ecogenicidade uterina foi determinada pelo grau de edema e a do CL foi classificada quanto à organização glandular. O sangue foi coletado por punção da veia jugular para determinação das concentrações de P4 pelo método ELISA. O índice pluviométrico não apresentou diferença estatística (p < 0,05). A taxa de luminosidade diferiu entre os períodos (p < 0,05). Peso e ECC não diferiram entre os períodos (p < 0,05). Dentre as éguas, 88,89% (8/9) ovularam no período chuvoso enquanto 55,56% (5/9) ovularam no período seco, não havendo diferença estatística (p < 0,05). Quanto à morfoecogenicidade uterina, não houve diferença significativa entre os períodos (p < 0,05). Houve diferença entre períodos (p > 0,05) para os níveis plasmáticos de P4, sendo maior a concentração no período chuvoso. Quanto à morfoecogenicidade de CL, estes apresentaram desde centro anecoico a hiperecogênico. Assim, as éguas do grupamento genético...(AU)

Características de morfoecogenicidade uterina e de corpo lúteo e suas relações com os níveis de plasmáticos de progesterona em éguas “baixadeiro” / Characteristics of morphoechogenicity and uterine corpus luteum and its relations with the plasma levels of progesterone in baixadeiro mares / Características de morfoecogenicidad uterino y del cuerpo luteo y sus relaciones con niveles plasmáticos de progesterona en yegua "baixadeiro"

El objetivo de este trabajo fue caracterizar los aspectos de morfoecogenicidad uterina y cuerpo lúteo (CL) y la relación con las concentraciones de progesterona (P4) en yeguas Baixadeiro, durante los períodos lluvioso y seco. Se utilizaron nueve animales, sincronizados con dos dosis de prostaglandina sintética análoga PGF2a, con un intervalo de 10 días y monitorizados mediante palpación transrectal y ecografía cada 48 horas. La ecogenicidad uterina se determinó por el grado de edema y la del CL se clasificó según la organización glandular. La sangre se recogió mediante punción de la vena yugular para determinar las concentraciones de P4 utilizando el método ELISA. El índice de precipitación no mostró diferencia estadística (p 0,05) para los niveles plasmáticos de P4, con mayor concentración en la época de lluvias. En cuanto a la morfoecogenicidad de CL, se presentaron de centro anecogénico a hiperecogénico. Así, las yeguas del grupo genético...

The aim of this study was to characterize the aspects of uterine morphology and corpus luteum (CL) and the relationship with progesterone concentrations (P4) of the "Baixadeiro" mares during the rainy and dry periods. Nine animals, synchronized with two doses of prostaglandin PGF2a synthetic analogue, were used at intervals of 10 days and monitored by transrectal palpation and ultrasonography every 48 hours. The uterine echogenicity was determined by the degree of edema and the CL was classified for glandular organization. Blood was collected by jugular vein puncture to determine P4 concentrations by the ELISA method. The rainfall index did not present statistical difference (p 0,05) for plasma P4 levels, with the highest concentration during the rainy season. As for the morfoecogenicity of CL, these presented from anechoic center to hyperechogenic. Thus, the mares of the genetic group "Baixadeiro" remained cyclical...

O objetivo com este trabalho foi caracterizar os aspectos de morfoecogenicidade uterina e de corpo lúteo (CL) e a relação com as concentrações de progesterona (P4) em éguas Baixadeiro, durante os períodos chuvoso e seco. Foram utilizados nove animais, sincronizados com duas doses de análogo sintético de prostaglandina PGF2a, com intervalo de 10 dias e monitorados por palpação transretal e ultrassonografia a cada 48 horas. A ecogenicidade uterina foi determinada pelo grau de edema e a do CL foi classificada quanto à organização glandular. O sangue foi coletado por punção da veia jugular para determinação das concentrações de P4 pelo método ELISA. O índice pluviométrico não apresentou diferença estatística (p 0,05) para os níveis plasmáticos de P4, sendo maior a concentração no período chuvoso. Quanto à morfoecogenicidade de CL, estes apresentaram desde centro anecoico a hiperecogênico. Assim, as éguas do grupamento genético...

Exercise training session-induced metabolic acidosis in barrel racing horses / Acidose metabólica induzida por sessão de treinamento em equinos de tambor

In horses, acid-base balance disorders are common after intense exercise, with metabolic acidosis being the most common after high intensity and short duration exercise. Understanding the processes that cause them is fundamental for procedures, which aimed to improve the physical fitness of horses for athletic purposes, with fewer changes in homeostasis. The present study assessed the effect of barrel racing on acid base balance in Quarter Horse, at the following times: T0 - immediately before training; T1 - immediately after the end of the second course; T2 - one hour after the end of the second course. In T1, there was decrease (P<0.05) in the pH, HCO3 -, pCO2, cBase, tCO2 and strong ion difference concentrations, while the plasma lactate and anion gap increased (P<0.05). It was concluded that barrel racing training caused transient metabolic acidosis in the horses, and hyperlactatemia was still present after an hour of rest.(AU)

As desordens no equilíbrio ácido base são comuns em equinos após exercício intenso. Exercícios de alta intensidade e curta duração ocasionam frequentemente acidose metabólica. Entender as alterações neste equilíbrio é essencial para instituir programas de treinamentos que visam melhorar o condicionamento físico dos equinos atletas, minimizando alterações na homeostasia. O estudo avaliou o efeito do treinamento de três tambores sobre o equilíbrio ácido base em equinos. A avaliação foi realizada nos seguintes tempos: T0 - imediatamente antes do início do treinamento; T1 - imediatamente após o fim do segundo percurso de treinamento; T2 - uma hora após o fim do segundo percurso. Em T1, ocorreu diminuição (P<0,05) nos valores do pH, HCO3 -, pCO2, cBase, tCO2 e diferença de íons fortes, enquanto o lactato e o ânion gap aumentaram (P<0,05). Conclui-se que o treinamento de três tambores causou acidose metabólica passageira nos equinos, sendo que a hiperlactatemia ainda permaneceu manifestada após uma hora de descanso.(AU)

Use of melatonin in the in vitro production of bovine embryos / Uso da melatonina na produção in vitro de embriões bovinos

We aimed to assess the effects of melatonin in the in vitro production of bovine embryos. Our experiment was conducted at the Laboratório de Reprodução Animal of the Universidade Estadual do Maranhão. The cumulus-oocyte complexes (COCs) were distributed among treatments at concentrations of 0, 10-1, 10-3 and 10-5 µMol/L melatonin. Our experiment was further divided into two: the first was to assess the effect of different concentrations of melatonin (treatments) on the maturation rate of COCs, and the second was to assess the effects of melatonin treatments on the in vitro production of bovine embryos. The results from the first experiment demonstrated no significant difference between the in vitro maturation rate of the cultivated COCs in treatments with melatonin. In the second experiment, however, melatonin treatments yielded statistically higher cleavage, morula and blastocyst rates in the 10-5 µM group (52.9%, 52.9%, and 35.3%, respectively), and lower rates in the 10-1 µM group (19.5%, 19.5% and 7.8%, respectively), compared to the others. The control group (no melatonin) and the 10-3 µM group showed similar results. We concluded that supplementation of melatonin in the in vitro maturation medium resulted in no improvement in the oocyte maturation rate, but in the in vitro production of embryos at different concentrations, the 10-5 µM group displayed better results, but with no improvement in the variables (P < 0.05).

Objetivou-se avaliar os efeitos da melatonina na produção in vitro de embriões bovinos. O experimento foi conduzido no Laboratório de Reprodução Animal da Universidade Estadual do Maranhão. Os complexos cumulus-oócitos (CCOs) foram distribuídos entre os tratamentos 0, 10-1, 10-3 e 10-5 µmol/L de melatonina. A avaliação foi dividida em dois experimentos, onde o primeiro avaliou o efeito dessas diferentes concentrações de melatonina (tratamentos) sobre a taxa de maturação dos CCOs e o segundo, o efeito desses tratamentos com melatonina sobre a produção in vitro de embriões bovinos. Os resultados no primeiro experimento demonstraram não haver diferença significativa na taxa de maturação in vitro dos CCOs cultivados no tratamento com melatonina. No entanto, o tratamento com melatonina no segundo experimento, as taxas de clivagens, mórulas e blastocistos, o grupo 10-5 µM foi estatisticamente superior (52,9%, 52,9% e 35,3%, respectivamente) e o grupo 10-1 µM inferior (19,5%, 19,5% e 7,8%, respectivamente) aos outros grupos. O grupo controle (sem melatonina) e o grupo 10-3 µM obtiveram resultados semelhantes. Concluiu-se que a suplementação da melatonina no meio de maturação in vitro não evidenciou melhoras na taxa de maturação dos oócitos, porém na produção in vitro de embriões em diferentes concentrações, o grupo 10-5 µM apresentou melhores resultados mesmo não havendo melhorias nas variáveis (P<0,05).

Use of melatonin in the in vitro production of bovine embryos / Uso da melatonina na produção in vitro de embriões bovinos

We aimed to assess the effects of melatonin in the in vitro production of bovine embryos. Our experiment was conducted at the Laboratório de Reprodução Animal of the Universidade Estadual do Maranhão. The cumulus-oocyte complexes (COCs) were distributed among treatments at concentrations of 0, 10-1, 10-3 and 10-5 µMol/L melatonin. Our experiment was further divided into two: the first was to assess the effect of different concentrations of melatonin (treatments) on the maturation rate of COCs, and the second was to assess the effects of melatonin treatments on the in vitro production of bovine embryos. The results from the first experiment demonstrated no significant difference between the in vitro maturation rate of the cultivated COCs in treatments with melatonin. In the second experiment, however, melatonin treatments yielded statistically higher cleavage, morula and blastocyst rates in the 10-5 µM group (52.9%, 52.9%, and 35.3%, respectively), and lower rates in the 10-1 µM group (19.5%, 19.5% and 7.8%, respectively), compared to the others. The control group (no melatonin) and the 10-3 µM group showed similar results. We concluded that supplementation of melatonin in the in vitro maturation medium resulted in no improvement in the oocyte maturation rate, but in the in vitro production of embryos at different concentrations, the 10-5 µM group displayed better results, but with no improvement in the variables (P < 0.05).(AU)

Objetivou-se avaliar os efeitos da melatonina na produção in vitro de embriões bovinos. O experimento foi conduzido no Laboratório de Reprodução Animal da Universidade Estadual do Maranhão. Os complexos cumulus-oócitos (CCOs) foram distribuídos entre os tratamentos 0, 10-1, 10-3 e 10-5 µmol/L de melatonina. A avaliação foi dividida em dois experimentos, onde o primeiro avaliou o efeito dessas diferentes concentrações de melatonina (tratamentos) sobre a taxa de maturação dos CCOs e o segundo, o efeito desses tratamentos com melatonina sobre a produção in vitro de embriões bovinos. Os resultados no primeiro experimento demonstraram não haver diferença significativa na taxa de maturação in vitro dos CCOs cultivados no tratamento com melatonina. No entanto, o tratamento com melatonina no segundo experimento, as taxas de clivagens, mórulas e blastocistos, o grupo 10-5 µM foi estatisticamente superior (52,9%, 52,9% e 35,3%, respectivamente) e o grupo 10-1 µM inferior (19,5%, 19,5% e 7,8%, respectivamente) aos outros grupos. O grupo controle (sem melatonina) e o grupo 10-3 µM obtiveram resultados semelhantes. Concluiu-se que a suplementação da melatonina no meio de maturação in vitro não evidenciou melhoras na taxa de maturação dos oócitos, porém na produção in vitro de embriões em diferentes concentrações, o grupo 10-5 µM apresentou melhores resultados mesmo não havendo melhorias nas variáveis (P<0,05).(AU)

Exercise training session-induced metabolic acidosis in barrel racing horses / Acidose metabólica induzida por sessão de treinamento em equinos de tambor

ABSTRACT: In horses, acid-base balance disorders are common after intense exercise, with metabolic acidosis being the most common after high intensity and short duration exercise. Understanding the processes that cause them is fundamental for procedures, which aimed to improve the physical fitness of horses for athletic purposes, with fewer changes in homeostasis. The present study assessed the effect of barrel racing on acid base balance in Quarter Horse, at the following times: T0 - immediately before training; T1 - immediately after the end of the second course; T2 - one hour after the end of the second course. In T1, there was decrease (P<0.05) in the pH, HCO3 -, pCO2, cBase, tCO2 and strong ion difference concentrations, while the plasma lactate and anion gap increased (P<0.05). It was concluded that barrel racing training caused transient metabolic acidosis in the horses, and hyperlactatemia was still present after an hour of rest.

RESUMO: As desordens no equilíbrio ácido base são comuns em equinos após exercício intenso. Exercícios de alta intensidade e curta duração ocasionam frequentemente acidose metabólica. Entender as alterações neste equilíbrio é essencial para instituir programas de treinamentos que visam melhorar o condicionamento físico dos equinos atletas, minimizando alterações na homeostasia. O estudo avaliou o efeito do treinamento de três tambores sobre o equilíbrio ácido base em equinos. A avaliação foi realizada nos seguintes tempos: T0 - imediatamente antes do início do treinamento; T1 - imediatamente após o fim do segundo percurso de treinamento; T2 - uma hora após o fim do segundo percurso. Em T1, ocorreu diminuição (P<0,05) nos valores do pH, HCO3 -, pCO2, cBase, tCO2 e diferença de íons fortes, enquanto o lactato e o ânion gap aumentaram (P<0,05). Conclui-se que o treinamento de três tambores causou acidose metabólica passageira nos equinos, sendo que a hiperlactatemia ainda permaneceu manifestada após uma hora de descanso.

Inseminação artificial por laparoscopia em ovinos: proposição de uma técnica anestésica / Artificial insemination by laparoscopy in sheep: proposition of an anesthetic technique

The objective of this study demonstrates that intravenous anesthesia (TIVA) total can be practical atthe field level with safety and practicality. 8 ewes were inseminated by laparoscopy under TIVA Glyceryl EtherGuaiacol (EGG) (50mg/ml), ketamine (1mg/ml) and xylazine (0.05mg / ml) in 5% glucose solution afterpremedication with xylazine and morphine and induction with ketamine and midazolam. physiological variableswere evaluated (HR, FR, T and SpO2) and electrocardiographic and qualitative parameters of anesthesia.Changes in variables HR, FR, T and some electrocardiographic variables were recorded, with no clinicalrepercussion, it is concluded that TIVA proposal gives anesthetic sufficient quality to perform the inseminationby laparoscopy safely, but intubation and oxygenation of patients are essential factors for the success of thetechnique.(AU)

Otimização do sistema de maturação in vitro de oócitos caprinos utilizando retinóides / Optimization of maturity system in vitro oocytes goats using retinoids

res of oocytes qualitatively similar to those produced in vivo. The ovaries were obtained in slaughterhouses in the metropolitan region of São Luis - MA and Recife-PE. It was tested, on 10 replicates, the efficiencyof retinol (RT) and retinoic acid (RA) on the in vitro maturation of oocytes goats, using as parameters thenuclear maturation stage. A significant difference was observed (P <0.05) in the percentage of matured oocyteswhen the MBM method was used (53%) compared to other means, demonstrating an increase in the number ofexpanded oocytes. There was no significant difference (P> 0.05) when compared to percentage of goat oocytesmatured in medium that used the RT and RA. It is possible to suggest that this is an effective strategy that shouldbe adopted to increase in vitro maturation.(AU)

Avaliação ultrassonográfica e ensaio hormonal das éguas “Baixadeiro” / Sonographic evaluation and hormonal testing of mares “Baixadeiro

This study aimed characterize aspects of uterine morphoechogenicity and CL, relating to the P4concentrations during the rainy and dry seasons. Nine mares were used, synchronized with two doses of 1,0 mLPGF2α and monitored by ultrasound and rectal palpation. The ecogenicity - uterine and CL - were determinedby the degree of edema and glandular organization, respectively. Had blood collected by puncturing the jugularvein for dosing P4 by ELISA. Among the mares was no difference in ovulation rate between the periods (P <0,05). As for uterine morphoechogenicity, there was no significant difference between periods (P > 0,05). Therewere differences between periods (P < 0,05) for plasma levels of P4, being higher in the rainy season.Regarding CL morphoechogenicity presented from anechoic to hyperechoic center. The changes in the uterineechogenicity and CL is the expected for the species as well as progesterone concentrations, showing nodifference between the periods.(AU)

Intervalo entre sincronização e ovulação das éguas Baixadeiro utilizando PGF2 / Interval between ovulation and synchronization of Baixadeiro mares using PGF2

The study aimed to verify the synchronization of mares genetic grouping Baixadeiro using PGF2α. Weused 8 mares being established two synchronization protocols - Protocol I: IM PGF2α dose; Protocol II: twodoses (PGF2α, IM) with 10-day interval. After 72 hours were monitored daily by means of ultrasound to monitorfollicle development. The evaluated mares showed interval between treatment and ovulation 11,16 ± 1,46 daysfor T1 and 5,2 ± 0,9 days for T2, with statistically significant difference (P < 0,05). As the diameter of the preovulatoryfollicle was found average of 38,08 ± 0,97 at T1 and 37,31 ± 3,45 in T2, with no significant differencebetween them (P > 0,05). Thus, treatment with two doses of PGF2α promotes return to ciclicity and is effective insynchronizing Baixadeiro mares which had follicular development patterns within the expected range for thespecies.(AU)

Hermafroditismo em gato Relato de caso / Hermaphroditism in cat - Case Report

The diagnosis of hermaphroditism or pseudo-hermafrditismo should not be based on an inspection ofchromosomes, gonads and the phenotypic appearance of the reproductive organs, and laparotomy. It was theVeterinary Hospital of UEMA cat, SRD. Physical examination Contacted That cat had female structures such asthe vagina and based on the pet's history this testicles also had. After castration, the animals can get pregnantand after the birth of the first puppy, the cat underwent surgery to remove the other dogs que were still in thewomb. Even during surgery ovariohysterectomy was performed for removal of the ovaries and uterus. The caseHermaphroditism is true because, according to the authors, the hermaphroditic animals should have copies ofboth gonads However, the genetic fri is female.(AU)

Avaliação da condição reprodutiva das éguas “Baixadeiras” a campo / Evaluation of the reproductive condition of the mares “Baixadeiras” field

The objective was to evaluate the breeding conditions in which the mares raised in swamp region atNorth of Maranhão (Baixada). It was selected 40 randomly female in breeding age in which it was held rectaltouch for gestation diagnosis and with the aid of an ultrasound device was made, in mares empty, the evaluationof the ovaries, uterus and cervix to identify the phase of the estrous cycle and the presence of a possiblepathology.(AU)

Aspectos biométricos e histológicos de testículos de garanhões do Grupamento Genético Baixadeiro / Biometric and histological aspects of stallions testicles Grouping Genetic Baixadeiro

This study aimed to evaluate the biometric and histological aspects of the testicles of horses Baixadeiro.Four stallions were used, with a mean age of 3,88 ± 1,24. The right and left testicles were measured for length,width, height and total scrotal width. The testicular volume was also determined and histological fragmentswere removed parenchyma of testis stained with H-E. There was no statistical difference between the linearmeasurements of the right testis and left (P > 0,05). The weight of the testes showed differences (P < 0,05) dueto the characteristics of the evaluated animals (cryptorchidism, testicular asymmetry). Histologically, bothshowed edema and hemorrhage as testicular degeneration. Thus, the animals showed values of scrotalcircumference lower than expected for the species, and testicular diseases, not being considered fit toreproduction.(AU)

Distribuição de partos e indicadores reprodutivos em fêmeas bubalinas no Município de São Mateus MA / Distribution of calves and reproductive indicators in buffalo females in São Mateus MA

The reproductive seasonality is a major reproductive characteristics reproductive in buffaloes, oftenrelated to low reproductive rates. This study aimed to establish the occurrence and the concentration period ofbirths in buffaloes heifers and cows and evaluate the calving interval (CI) and the period of service (PS) inprimiparous and pluriparous buffaloes. The study was conducted on a property in São Mateus - MA, at 4° 2' 26"south latitude and 44° 28' 6" W, in the 2012 and 2013 period. Data were collected from 1279 buffalo cows and242 buffalo heifers. The evaluated reproductive parameters was performed descriptive statistics and analysis ofvariance (ANOVA). The comparison of means was performed using the t test, with 5% significance level. Theparturition of heifers and cows were concentrated in the first half and reproductive rates were acceptable.(AU)

Produção in vitro de embriões bovinos oriundos de fêmeas previamente tratadas com somatotropina recombinante bovina (rbST) / In vitro production of bovine embryos derived from females previously treated with recombinant bovine somatotropin (rbST)

This study aimed to evaluate the effect of rbST on in vitro production of Girolanda female embryos.Ovum Pick-Up (OPU) was performed to obtain the cumulus-oocyte complexes (COCs) were subjected to thePIV. Pretreatment of rbST in cows Girolando did not influence the embryo development rate in vitro production.(AU)

Efeito do pré-tratamento da somatotropina recombinante bovina (rbst) sobre complexos cumulus-oócitos (CCOs) de fêmeas bovinas / Effect of pre-treatment of somatotropin recombinant bovine (rbst) complex on cumulus-oocyte (COCs) female bovine

Objective to evaluate the effect of pre-treatment of recombinant bovine somatotropin (rbST) oncumulus-oocyte complexes (CCOs) recovered from OPUs. Using 12 females bovine race Girolando, which theywere divided into three experimental groups: control 0mg, 250mg and 500mg rbST, applied at 12 day intervals.Then, were made five sessions of Ovum Pick Up (OPU) with the aid of ultrasound, with intervals of 7 days. Thevariables studied were submitted to normality test; normal data and standardized by mathematicaltransformations, were subjected to analysis of variance (ANOVA) or parametric test Student-Newman-Keulstocompare means. Obtained mean and standard deviation of the total pattern CCOs and CCOs viable accordingto the following treatments.So, the pre-treatment rbST not influence both in the proportion of CCOs viable andthe morphological quality of CCOs of bovine female.(AU)