Never heard of “quiverfull” until I watched the Duggar tv show.
I think it’s great to have as many children as one wants and can support. I have 4, wanted 10 or as many as I could have, but after 4 high risk births and 4 c-sections, that was enough for my body. If I ever happen to get pregnant again, fine, but certainly not trying to.
It’s common to assume that “quiverfull” means very large families, but some people simply don’t have many, or any, children, without any intervention by the parents. Accepting that - which doesn’t mean rejecting adoption - is part of having faith in God’s plans for us.