Efficacy of interferon-stimulated genes and pregnancy-associated glycoproteins for pregnancy diagnosis within an estrus resynchronization protocol for dairy cattle

2010 ◽  
Author(s):  
Jacob Elijah Colten Green
Keyword(s):  
Dairy Cattle ◽  
Pregnancy Diagnosis ◽  
Interferon Stimulated Genes

scholarly journals The Importance of Interferon-Tau in the Diagnosis of Pregnancy

2021 ◽  
Vol 2021 ◽  
pp. 1-6
Author(s):  
Alicja Kowalczyk ◽  
Ewa Czerniawska-Piątkowska ◽  
Marcjanna Wrzecińska
Keyword(s):  
Dairy Cattle ◽  
Specific Protein ◽  
Type I ◽  
Reproductive Disorders ◽  
Interferon Tau ◽  
Interferon Stimulated Genes ◽  
Genes Encoding ◽  
Pregnancy Status ◽  
New Type ◽  
Pregnancy Recognition

Several decades of improving dairy cattle towards unilateral utilization of dairy cattle led to enormous progress in the field of milk yield; however, it resulted in a number of unfavorable features, such as reproductive disorders, increased calf mortality, and reduced health. Most cases of embryo loss and/or lost pregnancies occur during the first four to five weeks of gestation; accurate detection for pregnancy during this period is likely to contribute to an improvement in gestation rates. A specific protein, interferon-tau (IFNT), stimulates interferon-stimulated genes (ISGs), and their expression increases during gestation within 21 days after insemination. In bovines, the early conceptus undergoes a phase of rapid growth and elongation before implantation, the latter occurring 2–3 weeks after fertilization. IFNT acts mainly in the endometrium of the luminal epithelium. It is a new type I interferon that regulates several genes encoding uterine-derived factors. They are crucial in the processes of preparing the uterus for placenta attachment, modifying the uterine immune system, and regulating early fetal development. Because IFNT is expressed and induces ISGs in the endometrium during pregnancy recognition, it was reasoned that surrogate markers for pregnancy or IFNT might be present in the blood and provide an indicator of pregnancy status in cattle.

Comparison of pregnancy diagnosis in dairy cattle by use of a commercial ELISA and palpation per rectum

2009 ◽  
Vol 235 (3) ◽  
pp. 292-298 ◽  
Author(s):  
Matthew W. Breed ◽  
Charles L. Guard ◽  
Maurice E. White ◽  
Mary C. Smith ◽  
Lorin D. Warnick
Keyword(s):  
Dairy Cattle ◽  
Pregnancy Diagnosis

Section A. Physiology of dairy cattle: I. Reproduction and lactation

1945 ◽  
Vol 14 (1-2) ◽  
pp. 195-224 ◽  
Keyword(s):  
Dairy Cattle ◽  
Hormone Therapy ◽  
Present Review ◽  
Dairy Herds ◽  
Milk Supply ◽  
Dairy Farmer ◽  
Pregnancy Diagnosis ◽  
The Past ◽  
The World

Some years ago the annual wastage of cows in dairy herds in Britain was estimated by Wright(1) to be approximately 22%, and of this about one-quarter was due to sterility. Recent figures(2) from Shropshire, Staffordshire and Warwickshire suggest that this position has not changed in the past few years. Thus in forty-eight herds containing 1925 cows there were 620 disposals in the 12 months ending September 1940. 23% of the disposals were due to sterility. The annual losses from bovine sterility in Britain have been calculated to be equivalent to £7,000,000 in milk alone. This fact is cited by Day(3) in a concise article on the control of sterility in which he discusses various factors which contribute to the problem. Some of these factors, such as contagious abortion and trichomonas infection, are pathological, but many others are functional or physiological. The present review is concerned only with the latter. Mackintosh (4), in an article on breeding and rearing to maintain the milk supply, summarizes for the practical dairy farmer many of the methods by which the incidence of functional sterility can be reduced. Both Day and Mackintosh emphasize the importance of pregnancy diagnosis, of detecting the short winter oestrus and of testing the fertility of the bull. They also mention that hormone therapy can frequently be used to great advantage for inducing oestrus. Knowledge of these factors and how best to deal with them has greatly increased during the past few years as a result of the work carried out in many research stations throughout the world.

Factors Affecting Progesterone in Milk for Pregnancy Diagnosis in Dairy Cattle

1976 ◽  
Vol 132 (5) ◽  
pp. 487-496 ◽  
Author(s):  
J.A. Pennington ◽  
S.L. Spahr ◽  
J.R. Lodge
Keyword(s):  
Dairy Cattle ◽  
Factors Affecting ◽  
Pregnancy Diagnosis
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