14530
Because they are able to breast feed , we hypothesized that this prolactin reduction is limited to climacteric , as result of lower estradiol exposure of the lactotrophs .
 Chemical: estradiol
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: estradiol