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The bodyfat percentage results may have been more favorable if the feeding period would have been bodyfat percentage shorter. Many studies have been conducted or are underway to determine possible mechanisms acting in the effect of fat on reproductive activity. Animal scientists bodyfat percentage in Florida have suggested that some of the fatty acids in the diet may inhibit synthesis of prostaglandin by the uterus resulting in extended life of the corpus luteum and its production of progesterone, thus avoiding death of the early embryo. Summary Results of research indicate supplemental dietary fat can affect reproductive end points in cattle. Results of our work suggest a positive response in pregnancy rate and calf weaning weights in lactating heifers when supplemental fat was fed for the last 50-60 days of gestation. The mechanisms of action are not clear at this time. †Since authoring this article, Dr. Bellows has retired from the USDA. This research was conducted under a cooperative agreement between USDA-ARS and the Montana Agric.
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