171 resultados para Animal reproduction


Relevância:

20.00% 20.00%

Publicador:

Resumo:


While feminist scholarship has centred reproduction in women’s lives, it has inadequately explored its meanings in men’s. If we assume that reproduction happens in relationships of one kind or another between males and females, then missing men is a considerable oversight. Although there is now much research on fatherhood,merely focussing on this end-stage assumes that women take care of all of the foreplay, leaving unanswered questions in relation, inter alia, to men’s desires for parenthood,men’s involvement in planning or lack of planning to have children, the way men struggle or cope with infertility, their encounters with new reproductive technologies and surrogate mothers, their experiences of foetal screening, their involvement in abortion decision-making, and their experiences of becoming or not becoming a father. In this article I argue that men have compelling experiences throughout the reproductive trajectory deserving of more attention. I offer a profeminist theoretical composition for advancing further enquiries on men and reproduction,which begins with the feminism-informed Critical Studies of Men and Masculinities (CSM), and then weaves this together with the theories of intimate citizenship, sociology of the body, and the sociology of science and technology. I will propose how concepts from these collective theories may be useful in opening up layered questions about gender relations, intimacy, bodies, and technologies in future studies of men and reproduction.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

Digital dermatitis (DD) is a bacterial disease that primarily affects the skin on the heels of cattle. It is a major cause of lameness in dairy cows and a significant problem for the dairy industry in many countries, causing reduced animal welfare and economic loss. A wide range of infection levels has been found on infected farms, prompting investigations into both farm level and animal level risk factors for DD occurrence. There also appears to be individual variation between animals in susceptibility to the disease. The identification of factors affecting individual variation in susceptibility to DD might allow changes in breeding policies or herd management which could be used to reduce DD prevalence. Factors mentioned in the literature as possibly influencing individual variation in susceptibility to DD include physical factors such as hoof conformation and properties of the skin, physiological factors such as the efficacy of the immune response, and behavioural factors such as standing half in cubicles. Further work is required to determine the influence of these factors, identify the genetic basis of variation, clarify the level of heritability of DD susceptibility and to determine how this is correlated with production and health traits currently used in breeding programmes.

Relevância:

20.00% 20.00%

Publicador:

Resumo:

The immune system comprises an integrated network of cellular interactions. Some responses are predictable, while others are more stochastic. While in vitro the outcome of stimulating a single type of cell may be stereotyped and reproducible, in vivo this is often not the case. This phenomenon often merits the use of animal models in predicting the impact of immunosuppressant drugs. A heavy burden of responsibility lies on the shoulders of the investigator when using animal models to study immunosuppressive agents. The principles of the three R׳s: refine (less suffering,), reduce (lower animal numbers) and replace (alternative in vitro assays) must be applied, as described elsewhere in this issue. Well designed animal model experiments have allowed us to develop all the immunosuppressive agents currently available for treating autoimmune disease and transplant recipients. In this review, we examine the common animal models used in developing immunosuppressive agents, focusing on drugs used in transplant surgery. Autoimmune diseases, such as multiple sclerosis, are covered elsewhere in this issue. We look at the utility and limitations of small and large animal models in measuring potency and toxicity of immunosuppressive therapies.