Sorry if this question was answered somewhere else but is the 'Impregnation' and 'Pregnancy' content going to be in-game if so how will it be handled?

Only passingly. We've got a few impreg/preggo encounters written in the design doc, but they're meant to be casual trysts along the way as you explore the game world. We're not planning a dedicated system that revolves around those kinks, it would bloat (hehe pun intended) our workload too much.