Like the Glow of Light-Green Emeralds
Itachi has been given a mission, to answer the plea for assistance from the Black clan, a clan the Uchiha are closely related to but too different from them to get along with. His father wants their precious 'demon blood gifted' males to join with his clan as the practice of breeding with demons the family so often does has produced/allowed the occasional individual male able to give birth. These children are normally powerful and talented. Death follows and the only one left is a toddler, Harry, Itachi insists he raises the child himself. MPreg, slash, over protective daddy Itachi. adorableness and silliness. Itachi has some issues.
I plan to have Harry old enough for boys to be interested in him 10-12 chapters. Itachi will not be pleased.