Given the level of vitriol and abuse handed out to single mothers and women in general by the catholic church over the generations, I think the Pope should shut up, cut the hypocrisy and mind his own business.
Many women choose to have fewer children because it protects their health, their financial freedom and their independence. I chose to have one happy, loved, well-provided-for dc, rather than five largely ignored, jumble-sale-dressed street kids (my parents).
The catholic church wants to return to a time of large, poorly educated families who relied on the catholic church and were therefore under its influence. Thankfully those days are gone and won't be back.
The planet needs fewer humans. And fewer bigoted old men.