"You did NOT just get my builder pregnant! You did NOT just get her pregnant!" I set all the old people who had mastered Reaserch and Farming to parenting thinking they would go after their own age. Instead all of my women from agees 18+ were pregnant, and I was trying to keep them off my two 18 year old builders uncovering the floor. They each had three kids before I was able to change all the guys to Healing.