Applied Use of Doppler Ultrasonography in Bovine Reproduction

Fontes, P. L. P.; Oosthuizen, Nicola

doi:10.3389/fanim.2022.912854

Cited by 2 publications

(1 citation statement)

References 101 publications

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“…The standing heat is the best reliable sign to estimate the optimized AI timing that relates to ovulation time in both cattle and buffaloes (Thakur et al, 2013). In the field of female reproductive tract that can be performed without impairing fertility or having a negative effect on reproductive system or conception (Kahn, 1992;Ribadu and Nakao, 1999;Fontes and Oosthuizen, 2022). For the most part, the great advantage of the animal reproductive ultrasound may accomplish the understanding of female buffaloes reproductive system and further successfully improve the AI.…”

Section: Comparison Of Ultrasonographic Measures Of Reproductive Trac...mentioning

confidence: 99%

Comparison of ultrasonographic measures of reproductive tract in Thai swamp buffalo heifers and cows

Majarune,

Maitreejet,

Tanjaichon

et al. 2023

Buffalo Bull.

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Although artificial insemination (AI) technology is widely used in buffalo breeding in Thailand, AI in buffaloes has a lower conception rate compared to AI in beef cattle. It is crucial to understand the development of the ovary and reproductive system of buffalo heifers and cows. The objective of the present study was to evaluate the reproductive tract characteristic using ultrasound measurements during the luteal and follicular phases in Thai swamp buffalo heifers and cows. The studies of reproductive tract were conducted in buffalo cows (n=8; BCS=3.38) and heifers (n=8; BCS=3.25). The reproductive tract was evaluated by measuring the size of the ovary, dominant follicle, CL, uterine horn, cervix, and vulva. The buffalo cows had larger diameter of the cervix and vulvar width (P<0.05) compared with those of heifers. In the follicular phase, buffalo cows had a mean ovarian diameter (ipsilateral POF) of 2.35 cm, and heifers had a mean ovarian diameter of 2.24 cm (P>0.05). The average preovulatory follicle diameter was 1.29 cm in buffalo cows and 1.18 cm in heifers (P>0.05). In the luteal phase, the mean ovarian diameter (ipsilateral CL) of buffalo cows was significantly larger than heifers (P<0.05; 2.46 vs. 2.09 cm, respectively). The diameters of the CL in buffalo heifers and cows were 1.27 and 1.47 cm, respectively (P>0.05). Buffalo cows and heifers have no differences in ovarian components in the follicular and luteal phases, but there are differences in the size of the reproductive tract, which reproductive tract of buffalo cows is larger than heifers.

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Section: Comparison Of Ultrasonographic Measures Of Reproductive Trac...mentioning

confidence: 99%

Comparison of ultrasonographic measures of reproductive tract in Thai swamp buffalo heifers and cows

Majarune,

Maitreejet,

Tanjaichon

et al. 2023

Buffalo Bull.

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Evaluating the use of luteal color Doppler ultrasonography and pregnancy-associated glycoproteins to diagnose pregnancy and predict pregnancy loss in Bos taurus beef replacement heifers

Holton

Melo

Dias

et al. 2022

Journal of Animal Science

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The objective of this study was to evaluate the use of corpus luteum (CL) color doppler (CD) ultrasonography and pregnancy associated glycoproteins (PAG) for early pregnancy diagnosis and examine their ability to predict late embryonic/early fetal mortality (LEM) in Bos taurus beef replacement heifers. Beef heifers (n = 178) were exposed to a 7-d CO-Synch + CIDR protocol followed by fixed-time artificial insemination (day 0). On days 20 and 22, B-mode and CD ultrasonography were performed to evaluate CL morphometries and blood perfusion, respectively. Heifers were considered non-pregnant when CL area was < 2 cm 2 or estimated luteal blood perfusion was ≤ 30% of the total luteal area. Blood samples were collected on days 25 and 29 to estimate circulating concentrations of PAG. Conventional ultrasonography on day 29 and 94 was utilized to determine pregnancy status and considered the gold standard method for pregnancy diagnosis. Pregnant heifers had greater (P < 0.01) CL diameter, area, volume, and blood perfusion when compared to non-pregnant heifers on days 20 and 22. Accuracy of CD on days 20 and 22, and PAG on day 25 and 29 were 91, 94, 96 and 98%, respectively. No false-negative results were observed for CD on both days 20 and 22 (negative predicted value = 100%) and false-positive results represented 8 and 6% of the diagnoses. Heifers that experienced LEM between days 29 and 94 of gestation had decreased luteal (P = 0.02) volume on day 20 and tended (P = 0.07) to have decreased concentrations of PAG on day 29 compared with heifers that maintained pregnancy. However, both CD and PAG failed to predict embryonic mortality. In conclusion, CD successfully detected most non-pregnant replacement heifers as early as day 20 of gestation, while resulting in no false negative diagnoses. Both CD and PAG failed to predict LEM in the present study.

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Applied Use of Doppler Ultrasonography in Bovine Reproduction

Cited by 2 publications

References 101 publications

Comparison of ultrasonographic measures of reproductive tract in Thai swamp buffalo heifers and cows

Comparison of ultrasonographic measures of reproductive tract in Thai swamp buffalo heifers and cows

Evaluating the use of luteal color Doppler ultrasonography and pregnancy-associated glycoproteins to diagnose pregnancy and predict pregnancy loss in Bos taurus beef replacement heifers

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