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Subsequently , the direct effects of RFRP - 3 on hormone and steroid secretion , the synthesis of subunit genes and the expression of proteins related to proliferation in the hypothalamus , pituitary and ovary were evaluated .
 RFRP - 3, steroid
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 RFRP - 3, steroid