How much pregnancy is in the game and how much pregnancy is in Raizin 7? I downloaded a full save and played around a little bit while not knowing anything about what I was doing in this game but couldn't really find any content of that variety.
In 8, I don't really know the percentage, but will guarantee pregnancy at the 5th injection.
The character CG will show pregnancy from month 7, and the dialogue will change too.
The game limits one pregnancy at a time. but you can change it in the "ana.txt".
But beware the exhaustion of the royal seeds.
Emperor has a limited descendant pool. I estimate between 20-30.
After all descendant in the pool were born. Every pregnancy in the royal family will result in miscarriage.
I guess passing the throne to another male in the royal family may renew the pool.
but I beat the game within one generation.