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Progesterone receptor ( PR ) plays a key role in reproductive functions , and compounds that inhibit progesterone action ( antiprogestins ) have potential use in the treatment of estrogen - and progesterone - dependent diseases , including uterine leiomyomas and breast cancer .
 Chemical: Progesterone; Chemical: progesterone; Chemical: antiprogestins; 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: Progesterone; Chemical: progesterone; Chemical: antiprogestins; Chemical: estrogen; Chemical: progesterone