Comparison of ovarian palpation, milk progesterone and plasma progesterone in the cow

摘要: Holstein cows were examined twice weekly, beginning at 13 to 18 days after parturition, using palpation per rectum and milk progesterone (P4) assay determine the functional status of corpus luteum (CL). These results then compared with P4 concentrations in plasma which test was more accurate detecting luteal tissue, or if both tests needed for optimal accuracy. The found be comparable except when concentration <1. 0 ng/ml. At this level, errors due occurred frequently than those since still palpable CL pregnancy could mistaken a 14 21 parturition. However, all other including <1.0 ng/ml post partum, neither nor considered better indicator status. Therefore, we conclude that combined use does not afford assessment function either alone.