The appearance of results in the transition from the embryonic to the fetal stage of prenatal development.

The appearance of implantation results in the transition from the embryonic to the fetal stage of prenatal development.  It is also the process wherein the organism that is developed becomes attached to the uterus. It also indicates the transition between the periods of germinal and embryonic stages. This stage is also critical because the process can sometimes be terminated due to the performance of the developing embryo.

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