The news is the bar codes that will be added to embryos (no RFID, here) are “biologically inert”:

The bar codes, which carry unique binary identification numbers, are biologically inert: they do not affect the rate of embryo development and are shed before the embryos implant into the wall of the uterus. The technique aims to simplify individual embryo identification, streamlining in vitro fertilisation and embryo transfer procedures.

via Short Sharp Science: Fertilised eggs get microscopic bar codes.