Why does an infant baby boy who dies before he can be circumcised have a circumcision performed after death? If, as the article states it is to prepare the body for the next world why is this ritual not performed on any Jewish male who dies without circumcision? It is my experiencing working in the chevra kadisha that this was not done.
The halacha to circumcise and name a newborn baby boy who has died before his bris milah is brought down in the Kitzur Shulchan Aruch at 163:7:
The circumcision is not a fulfillment of the mitzvah of bris milah, but is performed only to avoid burial of the child in the "shameful" state of being uncircumcised. See Beur HaGra 263:10. The Kitzur goes on to say that this circumcision is so important that if the baby was buried without doing the circumcision first, and they remembered right after the burial, they should reopen the grave and do it right away. If a few days have passed and decomposition is probable, then they do not do it. K.S.A. 163:7.
Based on the language "within eight days or afterwards" and the references to "shame" I would imagine that an older boy or man, who could not be circumcised because of medical reasons, but would have otherwise, then this law would also apply. As for someone who grew into an adult, and knew about the laws of circumcision, but still did not have it done, I'm not sure this would apply. CYLOR.