in order to assess the direct luteotropic effects of steroids , dispersed luteal cells from rats on day 8 or 16 of pregnancy were incubated for 2 h with various concentrations of estradiol ( 1-1000 ng/ml ) , testosterone ( 1-100 ng/ml ) or progesterone ( 1-100 ng/ml ) .
C0032961
pregnancy
C0014912
estradiol