the mean progesterone values were below 0.34 +/- 0.12 ( the detection limit ) both at estrus and in cases of clinically diagnosed inactive ovaries , 3.18 +/- 1.9 at proestrus , 2.25 +/- 1.2 postestrus and 13.22 +/- 6.74 at day 10 of the estrous cycle .
C0029939
ovaries
C0025329
estrous cycle