It reminds me of that line from the play
The Women (it was cut out of the movie version):
(Woman announces to another woman that Ms. Potter is going to have her 9th child)
Womans reaction: "Nine children! Nine children? What is she darling, careless or Catholic?"
I suppose that as long as they had enough money to care for all those kids it would be okay, but there is a point at which it isn't fair for the kids to have to literally mother and father their younger siblings every single day because the parents simply cannot do it.