11260
An increase in hypothalamic expression of at least two of the erbB receptors is initiated before the pubertal augmentation of gonadal steroid secretion and is completed on the day of the first preovulatory surge of gonadotropins .
 erbB receptors, gonadotropins
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 erbB receptors, gonadotropins