5729
When only data from rats that ejaculated in the fifth session were analyzed , SS rats ( n = 18 ) had reduced copulatory efficiency ( more mounts and intromissions before ejaculation ) compared to CTL rats ( n = 19 ) ( p = 0 . 004 ) , and CTL rats were twice as likely as SS rats to make more than one ejaculation in the fifth session ( p = 0 . 05 ) .
 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