Diagnóstico De Gestação Na Vaca Pela Ultra-Sonografia

Santos, Ivo Walter dos; Neves, Jairo Pereira

doi:10.1590/s0103-84781994000200027

Cited by 8 publications

(11 citation statements)

References 10 publications

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“…Despite its potential to rationalise productive capacity of herds (Santos et al, 2004b), foetal deaths were frequently attributed to ultrasound examination (Horder et al, 1986). Several studies focused on gestational loss, but Kaulfuss et al (1997) were the first to report on the use ultrasound for the diagnosis of embryo mortality in ewes.…”

Section: Introductionmentioning

confidence: 99%

Mortality determination and gender identification of conceptuses in pregnancies of Santa Ines ovine by ultrasound

et al. 2010

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The aim of this study was to monitor early gestation in Santa Ines ewes by ultrasound in order to determine embryo and foetal loss, and to identify foetal sex. Ewes (n = 132) were submitted to controlled natural mating. For the purpose of pregnancy diagnosis and embryo monitoring we used transrectal ultrasound with a linear transducer (6.0 and 8.0 MHz). Pregnancy was diagnosed on day 30. On day 35 ultrasound examination was performed to determine embryo viability or loss. On days 40, 50 and 60 ultrasound examination was used to monitor foetal loss and to determine foetal sex, through identification of the genital tubercle or any external genital structure. Out of 118 pregnant ewes, 76 (64.4%) presented single pregnancy and 42 (35.6%) multiple pregnancy. Embryonic deaths occurred in 10.0% of the 160 monitored embryos: 5.6% (9/160) occurred during the embryonic phase and 4.4% (7/160) during the foetal phase, with no significant difference between them. Embryo loss was significantly lower in single pregnancies (3.9%, 3/76) compared to multiple pregnancies (15.5%, 13/84). Sexing accuracy on day 40 was significantly lower than on day 60. There was no difference between days 40 and 50, and between days 50 and 60. This study on Santa Ines sheep shows that ultrasound is a highly effective method for diagnosis of early pregnancy, determination of embryo and foetal loss, as well as foetal sexing after day 50 of pregnancy.

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Section: Introductionmentioning

confidence: 99%

Mortality determination and gender identification of conceptuses in pregnancies of Santa Ines ovine by ultrasound

et al. 2010

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“…On the day before the start of the experiments, females received numbered plastic rings, were weighed and evaluated for body condition scoring (BSC) as previously described. 10 The reproductive status of the females was evaluated by ultrasound, 11 and vaginoscopy exam adapted from cattle. 12 Three bucks (24 to 48 months of age) were kept in individual stalls before the experiment onset and fed with grass as described below and supplemented with 200 g of concentrated feed (Durancho®, Nutrição Animal, Pesqueira, Brazil) and 200 g of corn grain (Zea mays, L)/animal/day.…”

Section: Methodsmentioning

confidence: 99%

“…Pregnancy diagnosis was determined by ultrasound examination on the 60th day after the last mating of the BS, as previously described. 11 The results were evaluated by descriptive statistical analysis, Student's T testing for comparing averages, chi-square for ratio comparison, and Fisher's test for comparing variances. Level of significance was 5%.…”

Section: Methodsmentioning

confidence: 99%

Duration of the breeding season on the reproductive performance of Anglo-Nubian goats during dry and rainy periods

et al. 2014

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The study was aimed to evaluate the effect of breeding season (BS) duration on goat reproduction during dry (DS) and rainy (RS) periods. Females were kept 300 m apart from bucks for 60 days. Females were randomly distributed among BS groups of 25 (BS25), 35 (BS35), and 45 (BS45) days during DS and RS. All females cycled, except during BS45 in DS (95%). The duration of BS did not affect estrous incidence during DS and RS. The percentage of females with two estrous was similar in RS (BS25: 30%, BS35: 35%, BS45: 35%) and DS (BS25: 25%, BS35: 30%, BS45: 25%). Three estrous were observed in BS35 and BS45 during RS (5%). First estrous (FE) and second estrous (SE) were detected from days in BS25 (FE: 1-21, SE: 7-21), BS35 (FE: 1-23, SE: 6-27), and BS45 (FE:1-23, SE: 9-20) during RS. During DS, estrous were detected within days BS25 (FE: 1-17, SE: 6-23), , and BS45 (FE: 2-21, SE: 6-21). Pregnancy rates were similar in RS (BS25: 90%, BS35: 95%, BS45: 95%) and DS (BS25: 75%, BS35: 80%, BS45: 75%). In conclusion, goat BS can be shorten despite weather without any effect on reproduction.

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“…The reproductive status of all ewes was assessed by ultrasonographic and vaginoscopic examinations and progesterone dosage 60 and 80 days after partuition. 11,12 Females were considered cycling when progesterone (P4) levels reached 1 ng mL -1 . 13 Blood samples for progesterone dosage were collected in vacutainer tubes by punctioning the jugular vein, transferred to 0.75 mL polypropylene tubes, and stored at −20°C until further use.…”

Section: Methodsmentioning

confidence: 99%

The influence of separation distance during the preconditioning period of the male effect approach on reproductive performance in sheep

et al. 2014

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The study was aimed to test the effect of the separation distance between males and females during the preconditioning period on the reproductive performance of Santa Inês ewes after the male effect. Santa Inês ewes were kept at distances of 3000 m (T1), 3 m (T2), and 300 m (T3) from rams for 60 days before starting 45-day mating seasons during the dry period (DP) and rainy periods (RP). Mating events were observed daily at 6:00 h and 16:00 h by trained personnel for one hour intervals. Estrous were scored as synchronized when observed until day 5 after breeding season start. Pregnancy diagnosis was performed by ultrasonography. In the DP, the first estrous averaged at 15.45±10.36 (T1), 9.25±6.41 (T2) and 13.05±10.24 (T3) days and in RP was 8.73±5.84 (T1), 9.30±5.62 (T2) and 6.10±5.66 (T3) days. All females cycled during both DP and RP. Estrous synchronization occurred in 20% of the females during DP (T1: 30%, T2: 15%, and T3: 15%). In the RP, estrous synchronization occurred in 40% of all females (T1: 30%, T2: 35%, and T3: 45%). The pregnancy rates in DP and RP were T1: 85%, T2: 80%, and T3: 75%. The results show that the male effect can be obtained simply by avoiding physical contact between males and females throughout the year under tropical conditions.

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Diagnóstico De Gestação Na Vaca Pela Ultra-Sonografia

Cited by 8 publications

References 10 publications

Mortality determination and gender identification of conceptuses in pregnancies of Santa Ines ovine by ultrasound

Mortality determination and gender identification of conceptuses in pregnancies of Santa Ines ovine by ultrasound

Duration of the breeding season on the reproductive performance of Anglo-Nubian goats during dry and rainy periods

The influence of separation distance during the preconditioning period of the male effect approach on reproductive performance in sheep

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