27501
We report the effects of ethanol intake and melatonin treatment ( at doses of 100 mu g / 100gBW / day ) on sex hormones and steroid receptors in the ovaries , oviducts and uteri of ethanol - preferring rats .
 ethanol, melatonin, steroid, ethanol
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 ethanol, melatonin, steroid, ethanol