5743
Males were dosed for 42 days beginning 14 days before mating , and females for 40 - 53 days beginning 14 days before mating to day 3 of lactation , including throughout the mating and gestation periods .
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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