Ultrasonography-accessed luteal size endpoint that most closely associates with circulating progesterone during the estrous cycle and early pregnancy in beef cows

Rocha, Cecília Constantino; Martins, Thiago; Cardoso, Beatriz de Oliveira; Silva, Luciano Andrade; Binelli, Mário; Pugliesi, Guilherme

doi:10.1016/j.anireprosci.2018.12.003

Cited by 37 publications

(32 citation statements)

References 39 publications

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“…The CL is a transient reproductive gland with the important function of producing progesterone (P4). Studies in animals have shown that CL size is positively correlated with P4 plasma levels (Rocha et al, 2019). In this project, CL analyses showed a trend toward an increase in the proportion of CL in relation to the total number of follicles per ovary in the high FA group.…”

Section: Discussionsupporting

confidence: 47%

The Effect of Folic Acid Supplementation in the Ovary and Upon Embryo Development

et al. 2019

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Faculty of Natural and Environmental Sciences School of Biological Sciences Thesis for the degree of Doctor of Philosophy The Effect of Folic Acid Supplementation in the Ovary and Upon Embryo Development by Reyna Stephanie Penailillo Escarate Altered maternal nutrition around conception can affect oocyte and embryo development which influences later-life health outcomes. Low folate is related to poor reproductive outcomes. Folic acid (FA) supplementation and fortification have been effective strategies to avoid NTD. On the other hand, the FA levels in women of reproductive age are increased more than recommended, with unknown consequences. This project aims to determine the effect of high FA diet on the

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Section: Discussionsupporting

confidence: 47%

The Effect of Folic Acid Supplementation in the Ovary and Upon Embryo Development

et al. 2019

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“…Area of the CL was determined using a B-mode still image and the tracing function. For CLs with anechoic fluid-filled cavities, the area of the cavity was subtracted from the total area 54 . The percentage of luteal area with color Doppler signals of blood flow at each examination was determined as described previously 14,55 .…”

Section: Ultrasound Evaluationsmentioning

confidence: 99%

“…Females were selected based on the CL blood perfusion and area on D18 (heifers bearing the largest CLs with at least > 40% of blood perfusion for the P group, and heifers bearing the smallest CLs with < 10% of blood perfusion for the NP group). These criteria was expected to generate contrasting groups of animals as the CL blood perfusion and area are strong correlate with P4 concentrations 54 , which is required during the pregnancy.…”

Section: Ultrasound Evaluationsmentioning

confidence: 99%

Early pregnancy-induced transcripts in peripheral blood immune cells in Bos indicus heifers

Rocha

Andrade

Melo

et al. 2020

Sci Rep

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Immune cells play a central role in early pregnancy establishment in cattle. We aimed to: (1) discover novel early-pregnancy-induced genes in peripheral blood mononuclear cells (PBMC); and (2) characterize the temporal pattern of early-pregnancy-induced transcription of select genes in pBMc and peripheral blood polymorphonuclear cells (PMN). Beef heifers were artificially inseminated on D0 and pregnancies were diagnosed on D28. On D10, 14, 16, 18, and 20, blood was collected for isolation of PBMC and PMN from heifers that were retrospectively classified as pregnant (P) or non-pregnant (NP). PBMC samples from D18 were submitted to RNAseq and 220 genes were differentially expressed between pregnant (P) and non-pregnant (NP) heifers. The temporal abundance of 20 transcripts was compared between P and NP, both in PBMC and PMN. In PBMC, pregnancy stimulated transcription of IFI6, RSAD2, IFI44, IFITM2, CLEC3B, OAS2, TNFSF13B, DMKN and LGALS3BP as early as D18. Expression of IFI44, RSAD2, OAS2, LGALS3BP, IFI6 and C1R in PMN was stimulated in the P group from D18. The novel early-pregnancy induced genes discovered in beef heifers will allow both the understanding of the role of immune cells during the pre-attachment period and the development of technologies to detect early pregnancies in beef cattle. In cattle, pregnancy success depends on the maintenance of a functional corpus luteum (CL) beyond the time of luteolysis, which normally occurs between days 15 and 18 of the estrous cycle 1,2. The CL maintenance in ruminants occurs in response to interferon-τ (IFN-τ) secreted by the conceptus 3. The INF-τ glycoprotein binds to its receptors and consequently inhibits the pulsatile secretion of prostaglandin F2α (PGF2α) from the endometrium, preventing luteolysis 4. Consequently, the CL remains active and secretes progesterone (P4) in concentrations sufficient for the establishment of pregnancy 1. Success in this sequence of events determines the outcome of pregnancy; however, as many as 50% of pregnancies fail until day 17 after artificial insemination (AI) 5. The mechanisms that mediate embryo survival and death are incompletely understood, but the maternal immune system plays an important role in embryo development during the pre-attachment period 6. A functional connection between the maternal immune system and the developing embryo is IFN-τ. The day-4 bovine embryo is already capable of synthesizing IFN-τ, which regulates the local immune environment in the oviduct 7. In addition, the in vitro development of bovine embryos from morula (day-5) to blastocyst stage (day-9), starts signaling the uterine epithelial and immune cells in co-culture to modulate the anti-inflammatory response mediated by IFN-τ 8. These changes contribute to conceptus growth and maternal immune modulation to prevent conceptus rejection 9. Therefore, an immunological crosstalk between embryo and immune cells exist locally in the uterus, however, how those signals influence the immune cells is currently unclear. Studies in ruminants during the last d...

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“…Different types of immunoassays are very useful to evaluate the reproductive performance of animals monitors the progesterone level to evaluate the reproductive status of the animal (Posthuma-Trumpie et al, 2009). Ultrasonography is also very germane to monitoring the luteal size and progesterone level as these both are very important for stability of pregnancy (Rocha et al, 2019). ELISA is a very famous new-age technology which is useful for determining the reproductive performances in the animal production sector.…”

Section: Use Of New-age Technologies In Animal Reproductive Performancesmentioning

confidence: 99%

Application of Modern Techniques in Animal Production Sector for Human and Animal Welfare

Ali

Ahmad

et al. 2020

Turkish JAF Sci.Tech.

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In this epoch, the tremendous increase in the world population accounts for the continuous supply of foodstuff. According to the FAO report, the global population is probable to cross the 9 billion in 2050. With constant population pressure, we are going to face the challenges of food shortage globally about agriculture. The animal production field provides a major share in the supply of foodstuff to compensate for the stress of food scarcity. By adopting the advanced technologies in the animal production field, its productivity can enhance significantly. Innovation in technology has made work easier with the development of different software and the internet. Technologic development made farmers work more contentedly hence, ultimately amplifying the animal production, proficiency, profitability as well as providing a prompt way for livestock sustainability. The animal production consists mainly of 8 factors including 3 major (animal breeding and genetics, animal nutrition, and reproductive performances) and 5 minor (health observation, farm management, water, manure, machinery, environment control, milking automation and electronic identification). The use of advanced technologies in these sectors is found to be fluent by intensifying the ratio of sustainable livestock farming and the welfare of mankind in terms of food security. In this review, innovative tactics and techniques for animal production are potted with positive research results and their drawbacks as well. The use of innovative technologies in their respective fields is close to taking control of whole world manufacturing under its hand to accomplish the world prerequisite regarding food scarcity.

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Ultrasonography-accessed luteal size endpoint that most closely associates with circulating progesterone during the estrous cycle and early pregnancy in beef cows

Cited by 37 publications

References 39 publications

The Effect of Folic Acid Supplementation in the Ovary and Upon Embryo Development

The Effect of Folic Acid Supplementation in the Ovary and Upon Embryo Development

Early pregnancy-induced transcripts in peripheral blood immune cells in Bos indicus heifers

Application of Modern Techniques in Animal Production Sector for Human and Animal Welfare

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