Which will not come between cytotrophoblast and maternal blood?
Ans: a (Decidua parietalis) Ref: Dutta, 6th ed, 31As seen clearly from the diagram, the decidua parietalis is situated away from the attatchment of the embryo and thus cannot come between the maternal blood and cytotrophoblast.
Decidua parietalis
Syncytiotrophoblast
Inter villous space
Basement membrane
Miscellaneous (Gynae)