Pregnancy in the game as something random is a very slippery ground. It gives the possibility that many women will be pregnant at the same time and it will have to be sensibly handled. This will leave a lot of issues to the industry for DC.
The most important thing is whether only MC will know about who the "father" of all these pregnancies will be, or will it be common knowledge for npc in the game. If this is common knowledge, the whole story must be directed so that at the end of the game the MC had something like a harem. Otherwise, the whole story will be too unlikely and meaningless. In addition, at the end of the MC should be quite a wealthy man because keeping children costs a lot. : D
In fact, I think that the pregnancies will be at the very end of the game. We'll finish the game with dozens of pregnant women near MC home on the beach + Aqua pregnant in the sea.
And collecting the jaw from the MC floor for this view. In total, it puzzles me if this "trap" is not going to MC surrounded by pregnant women with whom he had relationships. : D