8789
To assess the negative feedback effects of estrogens , LH was measured before and after ovariectomy and after estradiol ( E2 ) administration .
 Chemical: estrogens; 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: estrogens; Chemical: estradiol