While Mother Duggar is four months pregnant with her 19th child, the oldest Duggar child just became a father at age 21.
Duggar grandchild number one is older than her 19th aunt or uncle.
If all 19 Duggar children (presuming they stop there) have 19 children, the Duggars will have 361 grandchildren. And if each grandchild has 19 children, they will have 6,859 great-grandchildren.
Surely some of them will be gay or retarded.