9710
Ovarian progesterone induces and PG and IFNT stimulates endometrial HSD11B1 expression and keto - reductase activity as well as many epithelial genes that govern trophectoderm proliferation , migration , and attachment during elongation .
 progesterone, keto
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 progesterone, keto