1167
In conclusion , mid - follicular concentrations of exogenous hCG and progesterone , but not endogenous LH , are associated with live - birth rate in IVF patients treated with HP - hMG in a long GnRH agonist cycle .
 progesterone
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 progesterone