1383
Azoospermia was graded in the following way : adequate spermatozoa ( A1 ) , low , scanty or rare spermatozoa ( A2 ) , spermatid arrest ( B1 ) , spermatocyte arrest ( B2 ) , Sertoli cell - only pattern ( C ) and sclerosis ( D ) .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 None