Bovine Reproductive Ultrasonography: A Review

Ribadu, Abdullahi Y.; Nakao, Toshihiko

doi:10.1262/jrd.45.13

Cited by 36 publications

(43 citation statements)

References 111 publications

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“…The peak E 2 and LH concentrations in this study were within the range of those reported previously (Ribadu & Nakao 1999, Saumande & Humbolt 2005. The sequence and time relationships among the various endocrine/ovulation events in this study were also consistent with most of the related data published thus far (Schams et al 1977, Dieleman et al 1986, Larsson 1987, Rajamahendran et al 1989, Stevenson et al 1998, Saumande & Humbolt 2005, but there were some exceptions.…”

Section: Timing Of Estrus Onset E 2 and Lh Peakssupporting

confidence: 92%

Behavioral and hormonal pattern of repeat breeder cows around estrus

et al. 2015

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Repeat breeder (RB) cows were compared with normal (CTRL) ones with respect to behavioral estrus intensity, endocrine patterns and concentrations of plasma estradiol, progesterone and LH around estrus, and ovulation timing. A total of 27 and 31 cycles in 12 RB and 18 CTRL cows, respectively, were synchronized by means of the Ovsynch protocol followed by a single PG injection after 7 days. Behavioral estrus and ovulation were observed in 81.5 and 83.8% of the synchronized cycles in the RB and CTRL cows respectively. The RB and CTRL groups had similar estrus durations of 21.4 and 19.6 h respectively, but estrus was more intense in the RB, as indicated by numerically higher overall activity indexes and higher peak neck activity. The interval from PG injection to estrus onset (considered as proestrus) was 8.2 h shorter in RB than in CTRL cows, at 47.9 and 56.1 h respectively (P!0.007), but the average preovulatory follicle size was similar. The estradiol concentration at peak was numerically higher (21%) and the AUC tended to be higher in the RB cows than in the CTRL cows. LH secretion during the period from 18 to 3 h before the LH peak was also lower in RB than in CTRL cows: 2.5 and 4.6 ng/ml respectively (P!0.01). In conclusion, the behavioral estrus was more intense in the RB cows; nevertheless, short proestrus and subdued LH concentrations before the LH peak, which could impair oocyte competence and development, were first reported in RB cows.

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Section: Timing Of Estrus Onset E 2 and Lh Peakssupporting

confidence: 92%

Behavioral and hormonal pattern of repeat breeder cows around estrus

et al. 2015

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“…The linear probes using offer more detailed imaging of examined structures, which predisposes these probes for use in clinical trials (diagnosis of reproductive tract disorders). Moreover, Ribadu and Nakao [1] suggested that in routine bovine reproductive ultrasonography a 5 MHz linear rectal probe is the most effective.…”

Section: Disscusionmentioning

confidence: 99%

“…In veterinary practice, ultrasonography (USG) is the most profound technological advance to study changes in the ovarian morphology, including the characterization of bovine follicular waves and corpus luteum (CL) development during the estrous cycle and pregnancy [1] . The ultrasonographic examination is useful in the diagnosis of ovarian cysts and ovarian tumors in cattle [2] .…”

Section: Introductionmentioning

confidence: 99%

“…Most ultrasound scanners routinely used in bovine reproduction are B-mode (brightness modality) real-time scanners, equipped with probes of varying frequencies. The commonly used frequencies in bovine reproduction are 3.5, 5.0 and 7.5 MHz, depending on the type of scanner [1] . The higher frequency probes create better USG images [6] .…”

Section: Introductionmentioning

confidence: 99%

“…The higher frequency probes create better USG images [6] . There are two types of probes used commonly in veterinary reproductive practice: linear (frequencies of 5-7.5 MHz) and the sector probe (frequencies of 3.5-7 MHz) [1] . The data comparing mechanical sector probe to the linear array probe are very limited [5,10] .…”

Section: Introductionmentioning

confidence: 99%

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İki Farklı Prob (Mekanik Sektör ve Doğrusal Olanlar) Kullanarak Alınan Ultrasonografik Görüntülerin Karşılaştırılması ve Sığır Üreme Organlarının Makroskobik Özellikleri: Biyometrik Çalışmalar

Piotrowska-Tomala¹,

Jończyk²,

Bah³

et al. 2017

Kafkas Univ Vet Fak Derg

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Citation of This Article Piotrowska AbstractObjective of the study was to assess whether there are some differences in biometric measurements of the reproductive organs using mechanical sector or linear array ultrasound probe in comparison to the macroscopic measurements. The results revealed no significant differences between ultrasonographic (USG) images in comparison to macroscopic features. High correlations between post -mortem biometric measurements of examined structures and monitored via USG in conscious animals using both probes were found (P<0.001). In conclusion, both USG systems can be effectively used as clinical and research tools in the field of examination of bovine reproductive tract status.

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