9907
To determine the exposure timing and mechanisms of disrupted embryo implantation , four groups of females were fed with 0 or 40 ppm ZEA diets during premating ( weaning to mating ) and postmating ( D0 . 5 - D4 . 5 ) , respectively .
 Chemical: ZEA
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: ZEA