28584
Gonadotropin response to the 50 microgram GnRH challenge was tested every three months .
 Chemical: GnRH
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: GnRH 
Answer:
 Chemical: GnRH