Abstract
The levels of fecal progesterone of Mexican hairless pigs (laboratory miniature pig; adult female), in whichestrous signs are not clearly evident, were measured using a commercial bovine milk progesterone quantitative EIA kit. In six of eight pigs, the pattern of fluctuations of fecal progesterone was similar to that of swinewith normal estrous signs. An appropriate mating period was estimated for the six pigs based on the changein fecal progesterone level, and artificial insemination was performed accordingly. As a result, four of the sipigs conceived and gave birth. These findings suggest that estimating estrous cycles based on the measurementof fecal progesterone levels is effective for the reproduction of Mexican hairless pigs with unclear estroussigns, and that a commercial bovine milk progesterone quantitative EIA kit can be used for this measurement.
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