Pregnancy management utilizing measurements of plasma progesterone and estradiol concentrations during late pregnancy in thoroughbred mares that underwent colic surgery
2017
Satoh, M. (NOSAI Hidaka Mitsuishi Animal Medical Center, Hidaka-gun (Japan)) | Higuchi, T. | Inoue, S. | Gotoh, T. | Murase, H. | Nambo, Y.
It is reported that the serum concentration of progesterone and estradiol fluctuate before an abortion in thoroughbred mares with placentitis. In this study, the plasma progesterone and estradiol concentration in nine thoroughbred mares of late gestation was measured in pre- and post-colic surgery. Three of the nine mares were treated with trimethoprim/sulfamethoxazole, a drug for uterine atony, and synthetic progesterone, since the plasma progesterone concentrations were higher in post-surgery than the pre- surgery readings. The estradiol concentrations had high fluctuations and were not recognized as a fixed trend. All mares gave birth to normal foals. The present results suggest that monitoring progesterone concentrations after colic surgery might reduce the risk of abortions in Thoroughbred mares. Well-managed colic surgery was not a large influence on progesterone and estradiol concentrations. Therefore, the measurement of hormones before and after colic surgery is meaningful for understanding the conditions of pregnancy following an operation.
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