Effects of Fatty Acids on Reproduction of Dairy Cows
Authors: Staples, C.R.; Thatcher, W.W.
Source: Recent Advances in Animal Nutrition, 1 March 2006, vol. 2005, no. 1, pp. 229-256(28)
Abstract:There are many physiological factors within the cow that contribute to a successful conception, pregnancy, and delivery. These include the coordinated synthesis of steroid hormones, the development of ovarian follicles, ovulation of an oocyte, fertilization of that oocyte and subsequent embryo development, formation of a corpus luteum on the ovary for progesterone synthesis to maintain pregnancy, implantation, and continued fetal development until birth of a healthy calf. Imposed over these physiological, biochemical, and metabolic windows are the management factors such as heat detection, cow comfort, milk production, AI technique, ration formulation and feeding management to name a few. The influence of nutrient intake/status on reproductive performance is a growing field of study, including the effect of feeding supplemental fat. Fat supplementation in moderate amounts often stimulates milk production because of its high energy concentration, but its impact on reproduction is less consistent. Which fat sources might be most effective and which mechanisms of action are responsible have not yet been adequately defined. The purpose of this paper is to 1) review some of the effects of fat supplementation on reproductive tissues and pregnancy with some discussion given to possible mechanisms of action and 2) discuss some formulation strategies to increase the delivery of polyunsaturated fatty acids to the small intestine for absorption.
Document Type: Research Article
Publication date: March 1, 2006