7404
Livers were collected from virgin and pregnant C57BL / 6 mice at gestational days ( GD ) 7 , GD11 , GD14 , GD17 , and postpartum days ( PD ) 1 , PD15 , and PD30 .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None