20069
The aim of this study was to investigate the effects of sodium fluoride ( NaF ) on female reproductive function and examine the morphology of the ovaries and uteri of rats exposed to NaF .
 sodium fluoride, NaF, NaF
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 sodium fluoride, NaF, NaF