20092
Female rat pups were exposed to MeHg via maternal diet during intrauterinal and lactational period ( from gestational day 6 to postnatal day ( PND ) 10 ) , and their brain tissues were sampled for the analysis at weaning ( PND18 - 21 ) and adulthood ( PND61 - 70 ) .
 Chemical: MeHg
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: MeHg