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North American perspectives for cattle production and reproduction for the next 20 years.
Theriogenology
January 2025
Department of Animal Science, Texas A&M University, College Station, TX, 77843, USA.
Ruminant species are important to human society due to their ability to convert human-inedible sources of energy and protein to human-edible food. Greater efficiency of meat and milk production will require the management of the complex reproductive biology of many cattle with a limited capacity and limited budget within a smaller, hotter, and more climatically erratic land area. The over-riding drivers of new reproductive technologies in North America will be smaller economic margins, larger herd size, fewer agricultural workers per farm, and a greater reliance on automation to offset the reduced agricultural labor force.
View Article and Find Full Text PDFDevelopment of the world farm animal embryo industry over the past 30 years.
Theriogenology
December 2024
Embrapa Genetic Resources and Biotechnology, Brasília, 70770-901, Brazil; Data Retrieval Committee of the International Embryo Technology Society, Brazil. Electronic address:
Embryo technologies have been used over the past three decades globally in most relevant farm species. From a sanitary perspective, embryos collected in vivo have long been recognized as the safest way to trade livestock germplasm, as long as the IETS washing and, if recommended, trypsin-decontaminating procedures are adopted. On the other hand, a number of questions have been raised about the safety of embryos produced in vitro, frequently inhibiting the international commerce of these embryos.
View Article and Find Full Text PDFLong-term (10-year) monitoring of transposon-mediated transgenic cattle.
Transgenic Res
October 2024
LARTBio Inc., Gwangmyeong-si, Gyeonggi-do, Republic of Korea.
The production of transgenic animals using non-viral methods has raised questions regarding their long-term health and genomic stability. In this study, we evaluated these aspects in transgenic cattle over ten years, using transposon-mediated gene transfer. Our longitudinal analysis included a comprehensive health assessment and whole-genome DNA resequencing.
View Article and Find Full Text PDFGrowth differentiation factor 9 regulates the expression of estrogen receptors via Smad2/3 signaling in goat cumulus cells.
Theriogenology
April 2024
Key Laboratory of Animal Biotechnology, Ministry of Agriculture, College of Veterinary Medicine, Northwest A&F University, Yangling, 712100, Shaanxi, PR China. Electronic address:
Both oocyte secretory factors (OSFs) and estrogen are essential for the development and function of mammalian ovarian follicles, playing synergistic role in regulating oocyte growth. OSFs can significantly affect the biological processes regulated by estrogen in cumulus cells (CCs). It is a scientific question worth investigating whether oocyte secretory factors can influence the expression of estrogen receptors in CCs.
View Article and Find Full Text PDFVibration emissions affect the quality of liquid-preserved AI doses in stallions.
Theriogenology
April 2024
Institute for Reproduction of Farm Animals Schönow, Bernauer Allee 10, D-16321, Bernau, Germany. Electronic address:
Artificial insemination (AI) with liquid-preserved stallion semen is a widely used reproductive technology. As the demand for AI doses of high-class stallions is transnational, they are frequently exposed to long-distance transport. Since recent studies in boars indicated that vibration emissions caused by transport negatively affected sperm quality in vitro, this study questioned whether sperm quality in stallions is similarly impaired.
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