1447
Taken together , our results show differential effects of estrogen and progesterone on P450 expression , suggesting involvement of different regulatory mechanisms in female hormone - mediated P450 regulation .
 Chemical: estrogen; Chemical: progesterone
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: estrogen; Chemical: progesterone