11915
When males each encountered a sexually receptive female , there were fewer intromissions among those given 17 . 5 or 175 mu g and fewer ejaculations among those given 17 . 5 mu g , but the 1750 mu g dose had no effect .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None