low levels of pgf ( 48 plus or minus 12 ng/g dry tissue were measured in the endometrium on days 1-14 of the cycle . higher values ( 131 plus or minus 9.0 ) were found at days 15 until the day of estrus ( p less than 0.001 ) . similarly , very low levels of pgf were observed in the uterine vein plasma at days 1-14 ( 0.162 ) plus or minus 0.044 ) ng/mlm plus or minus s.e . ) , whereas on days 15 until the day of estrus the levels ranged from 1.5 to 3.0 ng/ml .
C0040300
tissue
C0151779
mlm