The info it's in this page,
- Different types of growth: breasts, ass, height, bimbo, muscle...
Breasts, ass, height are 100% confirmed
"Bimbo" will be something a bit different, not leveling up the character.
There will be another one more balanced, hourglass shape.
And about pregnancy, I may add it as something optional but it is not planned in the roadmap rn.