6940
It is associated with prolonged exposure to estrogens that is unopposed by the protective effects of progesterone , which suggests that altered progesterone biosynthesis , metabolism and actions might be implicated in the development of EC .
 Chemical: progesterone; 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: progesterone; Chemical: progesterone