4915
Taken together , our findings demonstrate that OP and BPA regulated the expression of genes associated with Ca transport in the pregnant mice , which may result in the decreased serum Ca levels .
 Chemical: BPA; Chemical: Ca; Chemical: Ca
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: BPA; Chemical: Ca; Chemical: Ca