Effects of soy isoflavones on the attainment of puberty in ewe lambs

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Title: Effects of soy isoflavones on the attainment of puberty in ewe lambs
Author: Griffith, Jerred
Abstract: In humans , diets containing high levels of soy isoflavones have shown to increase circulating estrogen levels . With this increase , early attainment of puberty has been experienced . Although a negative in humans , this could be a substantial gain in the some species of livestock . This research is designed to determine the effects of soy isoflavones on early development and early attainment of puberty in ewe lambs . Newly born Rambouillet and Suffolk ewe lambs were randomly assigned to either the control group ; cotton seed meal protein , or the treatment group ; soybean meal protein . Lambs were fed treatment specific diets from just following birth until breeding . Weights and blood samples were drawn to determine growth and performance as well as serum estrogen and progesterone levels . No difference (P > 0 .05 ) in growth and performance and reproductive activity was established between treatments . However , a difference was established (P < 0 .05 ) between estrogen concentration .
URI: http : / /hdl .handle .net /2346 .1 /30005
Date: 2012-05-12

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Griffith, Jerred Effects of soy isoflavones on the attainment of puberty in ewe lambs. Master's thesis, Angelo State University. Available electronically from http : / /hdl .handle .net /2346 .1 /30005 .

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