text:  165 E11_Null_Affected_repl 3 E9.5 embryo with craniorachiscisis and lack of chorioallantoic fusion RFC (reduced folate carrier) KO mouse; Folic acid trt, 25 mg/kg; E9.5; Genotype: Nullizygote; embryo with craniorachiscisis and lack of fusion of chorioallantois