While in E-O ewes, there was a significant increase of estradiol-17β concentration after introduction of the rams ( P < 0.05), in NE-O and NE-NO ewes, changes in estradiol-17β during this period did not reach statistical significance.
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Endocrine and ovarian changes in response to the ram effect in medroxyprogesterone acetate-primed Corriedale ewes during the breeding and nonbreeding season.
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