The answer is: Uninvolved Parents
Uninvolved parents generally have very little or zero interest in being involved in the development of their children. Usually, they became this type of parent because they are forced into the situation where they have to become the Parents or they have some sort of unfulfilled desire in their life and see their children as a riddance.
It is extremely common for these type of parents to be neglectful in watching over their children's physical and mental needs.