Before revision: During the last century of the reign of the House of Valois, when religious strife brought forth rivals for the throne, prince du sang became restricted in use to refer to dynasts who were distant members of the Royal Family (i.e., those who were not children or grandchildren in the male line of a French king and, as such, entitled to specific, higher rank of their own as enfants and petits-enfants de France).
After revision: During the last century of the reign of the House of Valois, when religious strife brought forth rivals for the throne, prince du sang became restricted in use to refer to dynasts who were distant members of the royal family (i.e., those who were not children or grandchildren in the male line of a French king and, as such, entitled to specific, higher rank of their own as enfants and petits-enfants de France).