This chapter would more naturally follow the 15th chapter of Leviticus. See the note to Leviticus 15:1.

And in the eighth day. —When the seven days had passed during which the mother remained unclean, the boy is to be circumc…

And in the eighth day the flesh of his foreskin shall be
circumcised .
Or the foreski…

After the laws concerning clean and unclean food, come the laws concerning clean and unclean persons. Man imparts his depraved nature to his offspr…