steroids were measured in serial plasma samples obtained from pregnant rats that had been ovariectomized , ovariectomized and adrenalectomized , or ovariectomized , adrenalectomized , and hypophysectomized and which had been treated with the steroid analogs dydrogesterone ( 9 beta,10 alpha-pregna-4 , 6-diene-3,20-dione ) and diethylstilbestrol [ ( e ) 4,4'- ( 1,2-diethyl-1,2- ethenediyl ) bisphenol ] to maintain pregnancy .
C0012203
diethylstilbestrol
C0032961
pregnancy