levels of progesterone were 1.7 plus or minus 0.3 ng/ml during proestrus , 3.5 plus or minus 0.3 ng/ml during early estrus and 23.3 plus or minus 2.8 ng/ml on day 5 after the lh peak . progesterone levels remained elevated through day 28 of diestrus and pregnancy .
C0033308
progesterone
C0032961
pregnancy