Ultrasonographic screening of embryo development in cattle (Bos indicus) between days 20 and 40 of pregnancy

Rosiles, V.A.; Galina, C.S.; Maquivar, M; Molina, R.; Estrada, Sandra

doi:10.1016/j.anireprosci.2005.01.006

Cited by 15 publications

(25 citation statements)

References 9 publications

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“…The discrepancies between these studies and the present findings might be that in earlier communications t h e breeding date was known. In a recent study carried out in Bos indicus with known breeding dates, the embryonic vesicle was first observed between days 18 and 20 and heartbeat detected by day 23 (Rosiles et al, 2005).…”

Section: Resultsmentioning

confidence: 99%

“…Ultrasound examination was performed 31 days after the first bulls were introduced and again every 16 days making a total of 8 examinations. The first identified cows that became pregnant in the first seven days after the bulls were added to the herd and the rest to sequentially detect pregnancies occurring during the mating period according t o the methodology proposed by Rosiles et al (2005).…”

Section: Methodsmentioning

confidence: 99%

“…In Bos indicus cattle embryonic mass and heartbeat can be accurately determined from day 23 (Rosiles et al, 2005). The precision of ultrasound for pregnancy diagnosis increases as long a s pregnancy continues (Pieterse et al, 1990b, Rosiles et al, 2005.…”

Section: Introductionmentioning

confidence: 99%

“…The precision of ultrasound for pregnancy diagnosis increases as long a s pregnancy continues (Pieterse et al, 1990b, Rosiles et al, 2005.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Ultrasonography as Aid for Early Pregnancy Diagnosis in Zebu Cattle in a Natural Mating Programme

Galicia¹,

Estrada²,

Galina³

et al. 2006

Journal of Applied Animal Research

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…The precision of ultrasound for pregnancy diagnosis increases as long a s pregnancy continues (Pieterse et al, 1990b, Rosiles et al, 2005.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Ultrasonography as Aid for Early Pregnancy Diagnosis in Zebu Cattle in a Natural Mating Programme

Galicia¹,

Estrada²,

Galina³

et al. 2006

Journal of Applied Animal Research

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show abstract

“…Starting from day 17th, US examinations once per week were carried out to identify the possible presence of an embryo [12], blood samples were obtained concomitantly to determine progesterone concentration. Pregnancy was defined as an animal showing an embryo vesicle with a heartbeat and corroborated with progesterone value greater than 1 ng/ml.…”

Section: Phase 3 Breeding Program and Assessment Ofmentioning

confidence: 99%

Effect of Changes in Body Weight, Body Condition and Back Fat During Last Month of Pregnancy on the Reproductive Efficiency of Bos indicus Cows in the Tropics of Costa Rica

Galindo¹,

Galina²,

Estrada³

et al. 2013

OJVM

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With the aim of evaluating how changes in the metabolic status in the last month of pregnancy affects reproductive efficiency, forty six Bos indicus multiparous cows (5.5 ± 2.4 parturitions), were used. Measurements of body weight (BW), body condition score (BCS) and dorsal back fat (BF) were taken in the last month of pregnancy, postpartum period previous to synchronization (average 50 d) and at breeding by natural mating following synchronization with a progestin (average 70 d). Average postpartum days to resumption to ovarian activity were 79.96 ± 16.5 d, and average postpartum days to conception was 88.5 ± 14 d. Days postpartum to resumption of the ovarian activity was positively correlated (0.51, P < 0.01) with days postpartum to conception, also, days postpartum to conception was positively correlated with prepartum back fat (14 d before parturition) (0.44, P < 0.05). It was observed that BF at calving which is an objective measurement had a low correlation with other productive variables such as BCS and BW (always less than 0.39). Body fat might be a more reliable indicator of the current metabolic status of the animal particularly in the last month of pregnancy when the indicators of BCS are somehow more difficult to interpret and subjective.

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Expression and localization of nodal in bovine oviduct and uterus during different functional stages of oestrus cycle and pregnancy

Argañaraz

Apichela

Kenngott

et al. 2012

Histochem Cell Biol

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Members of TGF-β superfamily play a major role in the endometrial changes involved in the establishment and maintenance of pregnancy. Their deregulated expression and action could lead to absolute or partial failure of embryo implantation. Nonetheless, the precise function and mechanism of many of these cytokines remain unclear. Nodal, a transforming growth factor beta (TGF-β) superfamily member, was characterized in the human and rodent uterus and implicated in the tissue remodeling events during menstruation and embryo implantation. In order to study its possible role in the cattle reproductive process, we have analyzed Nodal expression pattern and localization in the oviduct and uterine horn during the oestrus cycle and early pregnancy (day 20). Nodal was detected both in oviduct and uterus during either the oestrus cycle or pregnancy; however, it shows a differential expression profile in the uterine horn at dioestrus and pregnancy, decreasing 1.5 and 1.4 folds in comparison with oestrus. Nodal immunostaining intensity was observed in stromal and in epithelial cells of the surface and the glandular epithelium. The staining pattern correlates with the RT-qPCR expression profile. This work is the first to evidence the presence of Nodal in the bovine reproductive tract; our data suggest that Nodal is a novel cytokine that would be involved in the remodelling occurring in the endometrium of cattle during the oestrus cycle and in the embryo implantation. The identification of new molecules that participate in endometrium cycling and/or pregnancy may be useful for predicting the ability of the uterine tissue to establish and maintain pregnancy or for detecting the infertility processes. These results highlight Nodal as a possible novel marker of the fertility process, nevertheless further studies should be done to determine its role in the reproductive system.

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Ultrasonographic screening of embryo development in cattle (Bos indicus) between days 20 and 40 of pregnancy

Cited by 15 publications

References 9 publications

Ultrasonography as Aid for Early Pregnancy Diagnosis in Zebu Cattle in a Natural Mating Programme

Ultrasonography as Aid for Early Pregnancy Diagnosis in Zebu Cattle in a Natural Mating Programme

Effect of Changes in Body Weight, Body Condition and Back Fat During Last Month of Pregnancy on the Reproductive Efficiency of Bos indicus Cows in the Tropics of Costa Rica

Expression and localization of nodal in bovine oviduct and uterus during different functional stages of oestrus cycle and pregnancy

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