You could of course grow it in a person.......or a large mammal if placing it in a human is deemed unethical.....yes it will be fed by the surrogate
mother but if the DNA of the embryo is initially 100% (for the sake of simplicity lets call it bigfoot) bigfoot feotus will develop into 99% bigfoot
baby, child, adult.
Not that i'm an doctor or anything but 1. Since it is placed in the womb it is protected from antibodies or whatever and is not rejected by the body
(although i heard sometimes drugs are neccesary????:puz

and 2. No extra DNA is given to the Feotus so it wont become a hybrid or anything.