Is there another word for a "large family" or "small family"?

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.

Thanks

(tried to add this as a comment)

There are less technical but more loaded terms. In the 90's, yuppie couples who both worked and had no children were called DINKs (dual income, no kids). Among those with children, one might say American families range from "only-childers" (they had a perfect kid the first time, why risk getting a less-than perfect one on the second go-round?) to ZPGers (Zero Population Growth—they have, on average, about 2.1 kids, which is a really bad deal for the .1 kid) to "right to lifers" (eg faithful Catholics and even some Mormons, who seem to feel it's the wife's God-given duty to keep poppin' out kids until the reproductive equipment gives out). I don't know where my family fits in; my wife only had one visit to the maternity ward, but, unpredictedly, it turned out to be twins. Is there a term for that?