14752
Tex19 . 1 appears to play an important role in placenta function as Tex19 . 1 ( - / - ) mouse embryos exhibit intra - uterine growth retardation and have small placentas due to a reduction in the number of spongiotrophoblast , glycogen trophoblast and sinusoidal trophoblast giant cells .
 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