I'm searching for another, perhaps more technical term for a large and a small family.
To clarify, I simply mean a family with many children and one with very few, if any, children. So I'm not looking for any terms like "nuclear family". Just a family that is in large numbers and one that is in small numbers. Their household could even include of extended family, for all I care.
I assume that neither "populated family" nor "highly populated family" can be used for a large family.