OK, so my game was complete, but I let my village run on for a while. I unchecked breeding on everyone to keep the birthrate down and evntually the population leveled in the low 30's. Not too crowded, nice.
Then one day, I turned the thing on and suddenly had population 65! Three women nursing (the usual three, who go indoors now and then whether I tell them to or not); and 30 (thirty!) two-year olds! Where did all these little ones come from???